using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using System.Net;
using System.Text;

namespace NYAReader
{
	/// <summary>
	/// Data market data off the internet and creates
	/// web pages and graphs based on that data.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;
		private System.Windows.Forms.NumericUpDown numericUpDown1;
		private System.Windows.Forms.Button btnDownload;
		private System.Windows.Forms.Button btnGraph;
		private System.Windows.Forms.NumericUpDown numericUpDown2;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.CheckBox cbUseAllData;
		private System.Windows.Forms.ListBox lbStockList;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Button btnGenSPPage;
		private System.Windows.Forms.ProgressBar progressBar1;
		private System.Windows.Forms.Button btnDownloadQuotes;
		private System.Windows.Forms.Button btnDownloadSP;
		private System.Windows.Forms.NumericUpDown numericUpDown3;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.Button btnMakePage;

		public Form1()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//Load settings from last use of program, or use default settings
			//if there is no record of old settings.
			if (File.Exists(
				@"C:\Documents and Settings\All Users\Documents\NYAReader\options.txt"))
			{
				FileStream fs=new FileStream(
					@"C:\Documents and Settings\All Users\Documents\NYAReader\options.txt",
					FileMode.Open);
				StreamReader sr=new StreamReader(fs);
				numericUpDown1.Value=int.Parse(sr.ReadLine());
				numericUpDown2.Value=int.Parse(sr.ReadLine());
				numericUpDown3.Value=int.Parse(sr.ReadLine());
				cbUseAllData.Checked=bool.Parse(sr.ReadLine());
				lbStockList.SelectedIndex=int.Parse(sr.ReadLine());
				sr.Close();
			}
			else
			{
				numericUpDown1.Value=5;
				numericUpDown2.Value=253;
				numericUpDown3.Value=5;
				cbUseAllData.Checked=false;
				lbStockList.SelectedIndex=1;
			}
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.numericUpDown1 = new System.Windows.Forms.NumericUpDown();
			this.btnDownload = new System.Windows.Forms.Button();
			this.btnGraph = new System.Windows.Forms.Button();
			this.numericUpDown2 = new System.Windows.Forms.NumericUpDown();
			this.label2 = new System.Windows.Forms.Label();
			this.cbUseAllData = new System.Windows.Forms.CheckBox();
			this.lbStockList = new System.Windows.Forms.ListBox();
			this.label3 = new System.Windows.Forms.Label();
			this.btnGenSPPage = new System.Windows.Forms.Button();
			this.btnMakePage = new System.Windows.Forms.Button();
			this.progressBar1 = new System.Windows.Forms.ProgressBar();
			this.btnDownloadQuotes = new System.Windows.Forms.Button();
			this.btnDownloadSP = new System.Windows.Forms.Button();
			this.numericUpDown3 = new System.Windows.Forms.NumericUpDown();
			this.label1 = new System.Windows.Forms.Label();
			this.label4 = new System.Windows.Forms.Label();
			((System.ComponentModel.ISupportInitialize)(this.numericUpDown1)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.numericUpDown2)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.numericUpDown3)).BeginInit();
			this.SuspendLayout();
			// 
			// numericUpDown1
			// 
			this.numericUpDown1.Location = new System.Drawing.Point(208, 216);
			this.numericUpDown1.Name = "numericUpDown1";
			this.numericUpDown1.Size = new System.Drawing.Size(48, 20);
			this.numericUpDown1.TabIndex = 10;
			this.numericUpDown1.Value = new System.Decimal(new int[] {
																		 2,
																		 0,
																		 0,
																		 0});
			// 
			// btnDownload
			// 
			this.btnDownload.Location = new System.Drawing.Point(32, 96);
			this.btnDownload.Name = "btnDownload";
			this.btnDownload.Size = new System.Drawing.Size(88, 32);
			this.btnDownload.TabIndex = 12;
			this.btnDownload.Text = "Download Data";
			this.btnDownload.Click += new System.EventHandler(this.btnDownload_Click);
			// 
			// btnGraph
			// 
			this.btnGraph.Location = new System.Drawing.Point(32, 8);
			this.btnGraph.Name = "btnGraph";
			this.btnGraph.Size = new System.Drawing.Size(88, 40);
			this.btnGraph.TabIndex = 13;
			this.btnGraph.Text = "Generate Graphs";
			this.btnGraph.Click += new System.EventHandler(this.btnGraph_Click);
			// 
			// numericUpDown2
			// 
			this.numericUpDown2.Enabled = false;
			this.numericUpDown2.Location = new System.Drawing.Point(208, 240);
			this.numericUpDown2.Maximum = new System.Decimal(new int[] {
																		   10000,
																		   0,
																		   0,
																		   0});
			this.numericUpDown2.Minimum = new System.Decimal(new int[] {
																		   2,
																		   0,
																		   0,
																		   0});
			this.numericUpDown2.Name = "numericUpDown2";
			this.numericUpDown2.Size = new System.Drawing.Size(48, 20);
			this.numericUpDown2.TabIndex = 16;
			this.numericUpDown2.Value = new System.Decimal(new int[] {
																		 20,
																		 0,
																		 0,
																		 0});
			// 
			// label2
			// 
			this.label2.ImageAlign = System.Drawing.ContentAlignment.MiddleRight;
			this.label2.Location = new System.Drawing.Point(24, 240);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(176, 24);
			this.label2.TabIndex = 17;
			this.label2.Text = "Number of days to plot";
			this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// cbUseAllData
			// 
			this.cbUseAllData.CheckAlign = System.Drawing.ContentAlignment.MiddleRight;
			this.cbUseAllData.Checked = true;
			this.cbUseAllData.CheckState = System.Windows.Forms.CheckState.Checked;
			this.cbUseAllData.Location = new System.Drawing.Point(152, 264);
			this.cbUseAllData.Name = "cbUseAllData";
			this.cbUseAllData.TabIndex = 18;
			this.cbUseAllData.Text = "Use all data";
			this.cbUseAllData.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
			this.cbUseAllData.CheckedChanged += new System.EventHandler(this.cbUseAllData_CheckedChanged);
			// 
			// lbStockList
			// 
			this.lbStockList.Items.AddRange(new object[] {
															 "StockList.txt",
															 "SP500.txt"});
			this.lbStockList.Location = new System.Drawing.Point(136, 296);
			this.lbStockList.Name = "lbStockList";
			this.lbStockList.Size = new System.Drawing.Size(120, 30);
			this.lbStockList.TabIndex = 19;
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(32, 296);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(100, 32);
			this.label3.TabIndex = 21;
			this.label3.Text = "Stock list";
			this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// btnGenSPPage
			// 
			this.btnGenSPPage.Location = new System.Drawing.Point(144, 56);
			this.btnGenSPPage.Name = "btnGenSPPage";
			this.btnGenSPPage.Size = new System.Drawing.Size(88, 32);
			this.btnGenSPPage.TabIndex = 22;
			this.btnGenSPPage.Text = "Generate S&&P Page";
			this.btnGenSPPage.Click += new System.EventHandler(this.btnGenSPPage_Click);
			// 
			// btnMakePage
			// 
			this.btnMakePage.Location = new System.Drawing.Point(144, 8);
			this.btnMakePage.Name = "btnMakePage";
			this.btnMakePage.Size = new System.Drawing.Size(88, 40);
			this.btnMakePage.TabIndex = 23;
			this.btnMakePage.Text = "Generate Web Pages";
			this.btnMakePage.Click += new System.EventHandler(this.btnMakePage_Click);
			// 
			// progressBar1
			// 
			this.progressBar1.Location = new System.Drawing.Point(8, 336);
			this.progressBar1.Name = "progressBar1";
			this.progressBar1.Size = new System.Drawing.Size(248, 23);
			this.progressBar1.TabIndex = 24;
			// 
			// btnDownloadQuotes
			// 
			this.btnDownloadQuotes.Location = new System.Drawing.Point(144, 96);
			this.btnDownloadQuotes.Name = "btnDownloadQuotes";
			this.btnDownloadQuotes.Size = new System.Drawing.Size(88, 32);
			this.btnDownloadQuotes.TabIndex = 25;
			this.btnDownloadQuotes.Text = "Download Quotes";
			this.btnDownloadQuotes.Click += new System.EventHandler(this.btnDownloadQuotes_Click);
			// 
			// btnDownloadSP
			// 
			this.btnDownloadSP.Location = new System.Drawing.Point(32, 56);
			this.btnDownloadSP.Name = "btnDownloadSP";
			this.btnDownloadSP.Size = new System.Drawing.Size(88, 32);
			this.btnDownloadSP.TabIndex = 26;
			this.btnDownloadSP.Text = "Download S&&P 500";
			this.btnDownloadSP.Click += new System.EventHandler(this.btnDownloadSP_Click);
			// 
			// numericUpDown3
			// 
			this.numericUpDown3.Location = new System.Drawing.Point(208, 192);
			this.numericUpDown3.Name = "numericUpDown3";
			this.numericUpDown3.Size = new System.Drawing.Size(48, 20);
			this.numericUpDown3.TabIndex = 27;
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(24, 216);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(176, 16);
			this.label1.TabIndex = 28;
			this.label1.Text = "Number of days for volatility";
			this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(0, 192);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(200, 16);
			this.label4.TabIndex = 29;
			this.label4.Text = "Number of days for strength of trend";
			this.label4.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(264, 366);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.label4,
																		  this.label1,
																		  this.numericUpDown3,
																		  this.btnDownloadSP,
																		  this.btnDownloadQuotes,
																		  this.progressBar1,
																		  this.btnMakePage,
																		  this.btnGenSPPage,
																		  this.label3,
																		  this.lbStockList,
																		  this.cbUseAllData,
																		  this.label2,
																		  this.numericUpDown2,
																		  this.btnGraph,
																		  this.btnDownload,
																		  this.numericUpDown1});
			this.Name = "Form1";
			this.Text = "NYA Reader";
			this.Closing += new System.ComponentModel.CancelEventHandler(this.Form1_Closing);
			((System.ComponentModel.ISupportInitialize)(this.numericUpDown1)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.numericUpDown2)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.numericUpDown3)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		/// <summary>
		/// Reads a .csv file and stores the data in an array.
		/// </summary>
		/// <param name="fileName">The path of the file
		/// to be read.</param>
		/// <returns>Returns a two-dimensional array
		/// of the .csv data in string format.</returns>
		private string[,] readFile(string fileName)
		{
			Stream dataStream=File.OpenRead(fileName);
			BinaryReader br=new BinaryReader(dataStream);
			
			//Find out how many lines of data there are.
			int rows=br.ReadInt32();

			DateTime[] date=new DateTime[rows];
			float[] open=new float[rows];
			float[] high=new float[rows];
			float[] low=new float[rows];
			float[] close=new float[rows];
			int[] volume=new int[rows];
			
			//Read file.
			int month,day,year;
			for(int i=0; i<rows; i++)
			{
				month=br.ReadInt32();
				day=br.ReadInt32();
				year=br.ReadInt32();
				date[i]=new DateTime(year,month,day);
				open[i]=br.ReadSingle();
				high[i]=br.ReadSingle();
				low[i]=br.ReadSingle();
				close[i]=br.ReadSingle();
				volume[i]=br.ReadInt32();
			}

			//Reverse values so that latest day comes first. Other functions that call
			//readFile assume that the dates are in this order.

			Array.Reverse(date);
			Array.Reverse(open);
			Array.Reverse(high);
			Array.Reverse(low);
			Array.Reverse(close);
			Array.Reverse(volume);

			//Create 2-d array of strings.
			string[,] data=new string[rows,6];
			for(int i=0; i<rows; i++)
			{
				data[i,0]=date[i].ToLongDateString();
				data[i,1]=open[i].ToString();
				data[i,2]=high[i].ToString();
				data[i,3]=low[i].ToString();
				data[i,4]=close[i].ToString();
				data[i,5]=volume[i].ToString();
			}
			br.Close();

			return data;
		}
		

		/// <summary>
		/// Calculates statistics on the data sent by the
		/// readFile method.
		/// </summary>
		/// <param name="data">A two-dimensional array
		/// of market data in string form.</param>
		/// <returns>Returns an array of arrays
		/// containing the high, low, and average close and volume,
		/// volatility,gain/loss,and </returns>
		private float[][] calculateStats(string[,] data)
		{
			float[] closeHigh=new float[1],
				closeAve=new float[1], volHigh=new float[1];
			float volSum=0,closeSum=0;
			float[] volLow=new float[1], closeLow=new float[1],volAve=new float[1];;
			float val1,val2;
			float[][] stats=new float[9][];
			float[] rVol=new float[data.GetLength(0)];
				
			//check if there was an error reading the file.
			if (data[0,0]=="error")
			{
				stats[0][0]=-1;
				return stats;
			}

			/**calculate high, low, and sum close
			  *and volume data**/
			closeLow[0]=float.Parse(data[0,4]);
			volLow[0]=float.Parse(data[0,5]);
			closeHigh[0]=0;
			volHigh[0]=0;
			volAve[0]=0;
			closeAve[0]=0;
			for (int i=0; i<data.GetLength(0); i++)
			{
				if(closeHigh[0] < float.Parse(data[i,4]))
					closeHigh[0]=float.Parse(data[i,4]);
				if (closeLow[0] > float.Parse(data[i,4]))
					closeLow[0] = float.Parse(data[i,4]);
				if (volHigh[0]<float.Parse(data[i,5]))
					volHigh[0]=float.Parse(data[i,5]);
				if (volLow[0]>float.Parse(data[i,5]))
					volLow[0]=float.Parse(data[i,5]);
				closeSum+=float.Parse(data[i,4]);
				volSum+=float.Parse(data[i,5]);

			}

			closeAve[0]=closeSum/data.GetLength(0);
			volAve[0]=volSum/data.GetLength(0);

			//Calculate volatility.
			int n=(int)numericUpDown1.Value;
			float[] closeData=new float[data.GetLength(0)];
			for (int i=0; i<data.GetLength(0);i++)
			{
				closeData[i]=float.Parse(data[i,4]);
			}
			Array.Reverse(closeData);

			for(int j=n; j<closeData.GetLength(0); j++)
			{
				for(int i=0; i<n; i++)
				{
					val1=closeData[j-i];
					val2=closeData[j-i-1];
					rVol[j]+=Math.Abs(val1-val2)/val2;
				}
				rVol[j]*=100/n;
			}
			for(int i=n-1; i>=0; i--)
			{
				rVol[i]=-999;
			}
			Array.Reverse(rVol);

			//Calculate gain/loss.
			int rows=data.GetLength(0),lossDays=0,gainDays=0;
			bool[] loss=new bool[rows];
			float open,close,afterLoss=0,afterGain=0;
			float[] change=new float[rows],changePercent=new float[rows];
			for(int i=0; i<rows-1; i++)
			{
				open=float.Parse(data[i,1]);
				close=float.Parse(data[i,4]);
				change[i]=close-open;
				if(change[i]<0)
					loss[i]=true;
				else
					loss[i]=false;
			}

			for(int i=0; i<rows-1; i++)
			{
				changePercent[i]=change[i]/float.Parse(data[i+1,4])*100;
			}
			for(int i=0; i<rows-1; i++)
			{
				if (loss[i+1]==true)
				{
					afterLoss+=changePercent[i];
					lossDays++;
				}
				else
				{
					afterGain+=change[i];
					gainDays++;
				}	
			}
			
			float aveAfterLoss=afterLoss/lossDays;
			float aveAfterGain=afterGain/gainDays;
			float[] gainLoss=new float[2] {aveAfterLoss,aveAfterGain};

			//Calculate strength of trend.
			float[] index=new float[data.GetLength(0)];
			float[] percentChange=new float[data.GetLength(0)];
			char sign1,sign2;
			for(int i=0; i<data.GetLength(0); i++)
			{
				percentChange[i]=(float.Parse(data[i,4])-float.Parse(data[i,1]))/
					float.Parse(data[i,1])*100;
			}

			Array.Reverse(percentChange);

			for(int i=1; i<percentChange.Length; i++)
			{
				if(percentChange[i]>0)
					sign1='+';
				else 
					sign1='-';
				if(percentChange[i-1]>0)
					sign2='+';
				else
					sign2='-';
				if(sign1==sign2)
					index[i]=Math.Abs(percentChange[i]);
				else
					index[i]= -Math.Abs(percentChange[i]);
			}
			float[] average=new float[index.Length];
			float[] sum=new float[index.Length];
			int maxDays=(int)numericUpDown3.Value;
			for(int i=maxDays; i<index.Length; i++)
			{
				for(int j=0; j<=maxDays; j++)
				{
					sum[i]+=index[i-j];
				}
				average[i]=sum[i]/3;
			}
			for(int i=0; i<maxDays; i++)
			{
				average[i]=-999;
			}
			Array.Reverse(average);
			
			//Return results.
			stats[0]=closeHigh;
			stats[1]=closeLow;
			stats[2]=closeAve;
			stats[3]=volHigh;
			stats[4]=volLow;
			stats[5]=volAve;
			stats[6]=rVol;
			stats[7]=gainLoss;
			stats[8]=average;
			return stats;
		}

		/// <summary>
		/// Draws a line graph of close data and saves it as a .gif file.
		/// </summary>
		/// <param name="dates">Array of DateTimes that will be used for
		/// the x-axis.</param>
		/// <param name="yData">Array of floats used for the y-axis.</param>
		/// <param name="fileName">Indicates where the image
		/// will be saved and the filename of the image.</param>
		/// <param name="yBigInterval">Number of yData points between big ticks.</param>
		/// <param name="ySmallInterval">Number of yData points between small ticks.</param>
		/// <param name="xInterval">Interval between tick marks on x-axis. If 0, one
		/// tick every month. If 1, one tick every year.</param>
		/// <param name="color">The color of the graph.</param>
		/// <param name="reduce">If true, values will be made smaller by dividing
		/// by 1 million. If this method causes an infinite loop, set this
		/// parameter to true.</param>
		/// <param name="yAxisLabel">The label of the y-axis.</param>
		/// <param name="title">The title of the graph.</param>
		/// <param name="precision">The number of decimal places in the 
		/// <c>ySmallInterval</c> parameter. The <c>precision</c> parameter must
		/// be set correctly to avoid an infinite loop.</param>
		private void drawGraph(DateTime[] dates,float[] yData,string fileName,
			float yBigInterval,float ySmallInterval,int xInterval,Color color,bool reduce,
			string yAxisLabel,string title,int precision)
		{
			TimeSpan dateRange,fromStart;
			int numberOfDays;
			int yHighInt,yLowInt;
			decimal yLabel;
			decimal yHigh=0,yLow,yRange;
			decimal scaleX,scaleY;
			decimal tickInterval,posit;
			DateTime dateLabel,date;
			Pen axisPen=new Pen(Color.Black,2);
			Pen graphPen=new Pen(color);
			Pen tickPen=new Pen(Color.Black,1);
			Point origin,xEnd,yEnd,newPoint,oldPoint,tickPoint,textPoint;
			Font font=new Font("Times New Roman",7);
			Font titleFont=new Font("Times New Roman",30,FontStyle.Bold);
			Font labelFont=new Font("Times New Roman",12,FontStyle.Bold);
			SolidBrush brush=new SolidBrush(Color.Black);
			SolidBrush titleBrush=new SolidBrush(Color.FromArgb(75,Color.Black));
			string dateLabelString;
			Bitmap graph;
			Graphics g;
			int n=(int)numericUpDown1.Value;

			//Remove data that should not be graphed.
			if(cbUseAllData.Checked==false)
			{
				dates=removeData(dates);
				yData=removeData(yData);
			}
			int rows=dates.Length;
			DateTime latest=dates[0];
			DateTime earliest=dates[rows-1];
			decimal[,] pointCoord=new decimal[rows,2];

			//Make values smaller if bool reduce is true
			if(reduce)
			{
				for(int i=0; i<rows; i++)
				{
					float f=yData[i];
					f/=1000000;
					yData[i]=f;
				}
			}

			//Determine range of data and scale factor.
			//Graph dimensions: 500 x 400.
			//Image dimensions: 690 x 490. 
			yLow=(decimal)yData[0];
			for(int i=0; i<rows; i++)
			{
				if (yHigh<(decimal)yData[i] && yData[i]!=-999)
					yHigh=(decimal)yData[i];
				if (yLow>(decimal)yData[i] && yData[i]!=-999)
					yLow=(decimal)yData[i];
			}
			yLowInt=roundToInt(yLow);
			yHighInt=roundToInt(yHigh);
			yRange=yHigh-yLow;
			dateRange=latest-earliest;
			numberOfDays=dateRange.Days;
			scaleY=400/yRange;
			scaleX=500/(decimal)numberOfDays;

			//Find how many pixels above and to the right of 
			//the origin each point should go.
			for(int i=0; i<rows; i++)
			{
				if(yData[i]==-999)
					pointCoord[i,1]=-999;
				else
					pointCoord[i,1]=((decimal)yData[i]-yLow)*scaleY;
				date=dates[i];
				fromStart=date-earliest;
				pointCoord[i,0]=fromStart.Days*scaleX;
			}


			//Draw axes; 90 pixels total space
			//from graph to top and bottom side
			//of image. 90 pixels total space from graph to
			//left and right side of image.
			origin=new Point(80,410);
			xEnd=new Point(580,410);
			yEnd=new Point(80,10);
			Point yEnd2=new Point(580,10);
			graph=new Bitmap(690,490);
			g=Graphics.FromImage(graph);
			g.Clear(Color.White);
			g.DrawLine(axisPen,origin,xEnd);
			g.DrawLine(axisPen,origin,yEnd);
			g.DrawLine(axisPen,xEnd,new Point(xEnd.X,yEnd.Y));

			//Draw y-axis tick marks and labels.
			posit=0;
			tickInterval=roundToInt((decimal)ySmallInterval*scaleY);
			tickPoint=new Point(origin.X,origin.Y);
			Point tickPoint2=new Point(xEnd.X,xEnd.Y);
			textPoint=new Point(0,0);
			Point textPoint2=new Point(0,0);
			double j=0;
			textPoint.X=tickPoint.X-27;
			textPoint.Y=tickPoint.Y-5;
			textPoint2.X=tickPoint2.X+10;
			textPoint2.Y=tickPoint2.Y-5;
			g.DrawString(yLowInt.ToString(),font,brush,textPoint);
			g.DrawString(yLowInt.ToString(),font,brush,textPoint2);
			while(origin.Y-posit>=yEnd.Y)
			{
				j=Math.Round(j,precision);
				if (((yLowInt+j)%yBigInterval)==0)
				{
					drawTick(g,tickPen,tickPoint,false,6);
					drawTick(g,tickPen,tickPoint2,false,6);
					textPoint.X=tickPoint.X-27;
					textPoint.Y=tickPoint.Y-5;
					textPoint2.X=tickPoint2.X+10;
					textPoint2.Y=tickPoint2.Y-5;
					yLabel=(decimal)(yLowInt+j);
					g.DrawString(yLabel.ToString(),font,brush,textPoint);
					g.DrawString(yLabel.ToString(),font,brush,textPoint2);
				}
				else
				{
					drawTick(g,tickPen,tickPoint,false,3);
					drawTick(g,tickPen,tickPoint2,false,3);
				}
				j+=ySmallInterval;
				posit+=tickInterval;
				tickPoint.Y=origin.Y-roundToInt(posit);
				tickPoint2.Y=tickPoint.Y;
				tickPoint2.X=tickPoint.X + 500;
			}
			tickPoint.X=yEnd.X;
			tickPoint.Y=yEnd.Y;
			tickPoint2.X=yEnd2.X;
			tickPoint2.Y=yEnd2.Y;
			drawTick(g,tickPen,tickPoint,false,6);
			drawTick(g,tickPen,tickPoint2,false,6);
			g.DrawString(yHigh.ToString(),font,brush,10,5);
			g.DrawString(yHigh.ToString(),font,brush,yEnd2.X+30,yEnd2.Y-5);

			//Draw x-axis tick marks and labels.
			//One tick every month.
			posit=0;
			j=0;
			tickPoint.X=origin.X;
			tickPoint.Y=origin.Y;
			tickInterval=1.0M*scaleX;
			while(origin.X+posit<=xEnd.X)
			{
				dateLabel=earliest.AddDays(j);
				if(dateLabel.Day==1)
				{
					if(dateLabel.Month==1)
					{
						this.drawTick(g,tickPen,tickPoint,true,6);
						textPoint.X=tickPoint.X-15;
						textPoint.Y=tickPoint.Y+25;
						dateLabelString=dateLabel.Month.ToString()+"/"+
							dateLabel.Day.ToString()+"/"+
							dateLabel.Year.ToString();
						g.DrawString(dateLabelString,font,brush,textPoint);
					}
					else
					{
						if(xInterval==0)
						{
							drawTick(g,tickPen,tickPoint,true,3);
							textPoint.X=tickPoint.X-7;
							textPoint.Y=tickPoint.Y+10;
							dateLabelString=dateLabel.Month.ToString()+"/"+
								dateLabel.Day.ToString();
							g.DrawString(dateLabelString,font,brush,textPoint);
						}
					}
				}
				j++;
				posit+=tickInterval;
				tickPoint.X=origin.X+roundToInt(posit);
			}

			//Draw graph.
			for(int i=0; i<rows-1; i++)
			{
				if(pointCoord[i,1]!=-999 && pointCoord[i+1,1]!=-999)
				{
					oldPoint=new Point(origin.X+roundToInt(pointCoord[i,0]),
						origin.Y-roundToInt(pointCoord[i,1]));
					newPoint=new Point(origin.X+roundToInt(pointCoord[i+1,0]),
						origin.Y-roundToInt(pointCoord[i+1,1]));
					g.DrawLine(graphPen,oldPoint,newPoint);
				}	
			}

			//Draw title and axis labels.
			g.DrawString(title,titleFont,titleBrush,200,20);
			g.DrawString("Date",labelFont,brush,330,450);
			g.RotateTransform(-90);
			g.DrawString(yAxisLabel,labelFont,brush,-280,15);

			//Save image
			graph.Save(fileName,ImageFormat.Gif);

			g.Dispose();
			axisPen.Dispose();
			graphPen.Dispose();
			tickPen.Dispose();
			font.Dispose();
			brush.Dispose();
			titleBrush.Dispose();
			titleFont.Dispose();
			labelFont.Dispose();
			
		}


		/// <summary>
		/// Generates an html file showing statistics on market data from
		/// a .csv file.
		/// </summary>
		/// <param name="path">The path of the .csv file to be used
		/// in making the web page.</param>
		/// <param name="fileName">Indicates where the web page will be
		/// saved and its filename.</param>
		private void generateWebPage(string path,string fileName,string symbol)
		{
			StreamWriter sw=new StreamWriter(fileName,false);
			string[,]data=readFile(path);
			float[][] stats=calculateStats(data);

			//Handle error opening file.
			if(data[0,0]=="error")
				return;

			//Find out what the next and previous stock symbols are.
			StreamReader sr=new StreamReader(@"C:\daddy\MathCom\SP500.txt");
			string lineString="",previous="",next="";
			int lineNumber=0;
			for(int i=0; i<500; i++)
			{
				lineString=sr.ReadLine();
				if(lineString==symbol)
				{
					next=sr.ReadLine();
					break;
				}
				lineNumber++;
			}
			sr.BaseStream.Seek(0,SeekOrigin.Begin);
			sr.BaseStream.Position=0;
			sr.DiscardBufferedData();

			for(int i=0; i<lineNumber; i++)
			{
				previous=sr.ReadLine();
			}
			if (lineNumber==0)
				previous="";
			if(lineNumber==499)
				next="";

			//Links
			sw.WriteLine("<table width='100%' border=0><tr>");
			sw.WriteLine("<td><a href='http://www.mathematicalanalysis.com/index.html'>");
			sw.WriteLine("mathematicalanalysis.com</a></td>");
			sw.WriteLine("<td><a href='SP500.html'>S&P 500 Components</a></td>");
			if(previous!="")
				sw.WriteLine("<td><a href='"+previous+".html'>Previous</a></td>");
			if(next!="")
				sw.WriteLine("<td><a href='"+next+".html'>Next</a></td>");
			sw.WriteLine("</tr></table><hr>");

			//Title
			sw.WriteLine("<html><head><title>Market Data for "
				+symbol+ "</title></head><body>");
			string title="",industry="";
			string[][] info = getSPData(false);
			for (int i=0; i<500; i++)
			{
				if (info[i][0]==symbol)
				{
					title=info[i][1];
					industry=info[i][9];
					break;
				}
			}
			sw.WriteLine("<center><h1>" + symbol + " - " + title + "</h1></center>");
			sw.WriteLine("<center><h3>[" + industry + "]</h3></center>");

			//Table of stats
			sw.WriteLine("<table align='center' border=1>");
			sw.WriteLine("   <caption>As of "
				+ DateTime.Parse(data[0,0]).ToShortDateString() + "</caption>");
			sw.WriteLine("<tr><th></th><th>Performance</th><th>Average Volume</th></tr>");
			sw.WriteLine("<tr><th>Current Price</th>");
			sw.WriteLine("<td>" + data[0,4] + "</td> <td></td> </tr>");
			sw.WriteLine("<tr><th>Past Week</th>");

			float change=0,volAvg=0,volSum=0;
		
			if(data.GetLength(0)>5)
			{
				change=(float.Parse(data[0,4])-float.Parse(data[4,4]))
					/ float.Parse(data[4,4]) * 100;
				change=(float)Math.Round(change,1);
				for(int i=0; i<5; i++)
				{
					volSum+=float.Parse(data[i,5]);
				}
				volAvg=volSum / 5;
				sw.WriteLine("<td>"+change.ToString()+"%</td><td>"+volAvg+"</td></tr>");
			}
			else
				sw.WriteLine("<td>N/A</td><td>N/A</td></tr>");

			sw.WriteLine("<tr><th>Past Month</th>");
			
			if(data.GetLength(0)>21)
			{
				change=(float.Parse(data[0,4])-float.Parse(data[20,4]))
					/ float.Parse(data[20,4]) * 100;
				change=(float)Math.Round(change,1);
				volSum=0;
				for(int i=0; i<21; i++)
				{
					volSum+=float.Parse(data[i,5]);
				}
				volAvg=volSum / 21;
				sw.WriteLine("<td>"+change.ToString()+"%</td><td>"+volAvg.ToString()
					+"</td></tr>");
			}
			else
				sw.WriteLine("<td>N/A</td><td>N/A</td></tr>");

			sw.WriteLine("<tr><th>Past Quarter</th>");

			if(data.GetLength(0)>63)
			{
				change=(float.Parse(data[0,4])-float.Parse(data[62,4]))
					/ float.Parse(data[62,4]) * 100;
				change=(float)Math.Round(change,1);
				volSum=0;
				for(int i=0; i<63; i++)
				{
					volSum+=float.Parse(data[i,5]);
				}
				volAvg=volSum / 63;
				sw.WriteLine("<td>"+change.ToString()+"%</td><td>"+volAvg.ToString()
					+"</td></tr>");
			}
			else
				sw.WriteLine("<td>N/A</td><td>N/A</td></tr>");

			sw.WriteLine("<tr><th>Past Year</th>");

			if(data.GetLength(0)>253)
			{
				change=(float.Parse(data[0,4])-float.Parse(data[252,4]))
					/ float.Parse(data[252,4]) * 100;
				change=(float)Math.Round(change,1);
				volSum=0;
				for(int i=0; i<253; i++)
				{
					volSum+=float.Parse(data[i,5]);
				}
				volAvg=volSum / 253;
				sw.WriteLine("<td>"+change.ToString()+"%</td><td>"+volAvg.ToString()
					+"</td></tr>");
			}
			else
				sw.WriteLine("<td>N/A</td><td>N/A</td></tr>");

			sw.WriteLine("<tr><th>Past 3 Years</th>");

			if(data.GetLength(0)>758)
			{
				change=(float.Parse(data[0,4])-float.Parse(data[757,4]))
					/ float.Parse(data[757,4]) * 100;
				change=(float)Math.Round(change,1);
				volSum=0;
				for(int i=0; i<758; i++)
				{
					volSum+=float.Parse(data[i,5]);
				}
				volAvg=volSum / 758;
				sw.WriteLine("<td>"+change.ToString()+"%</td><td>"+volAvg.ToString()
					+"</td></tr>");
			}
			else
				sw.WriteLine("<td>N/A</td><td>N/A</td></tr>");

			sw.WriteLine("<tr><th>Past 10 Years</th>");

			if(data.GetLength(0)>2525)
			{
				change=(float.Parse(data[0,4])-float.Parse(data[2524,4]))
					/ float.Parse(data[2524,4]) * 100;
				change=(float)Math.Round(change,1);
				volSum=0;
				for(int i=0; i<2525; i++)
				{
					volSum+=float.Parse(data[i,5]);
				}
				volAvg=volSum / 2525;
				sw.WriteLine("<td>"+change.ToString()+"%</td><td>"+volAvg.ToString()
					+"</td></tr>");
			}
			else
				sw.WriteLine("<td>N/A</td><td>N/A</td></tr>");
			sw.WriteLine("</table>");

			//Graphs
			sw.WriteLine(
				@"<image src='"+symbol+"close.gif'>");
			sw.WriteLine(
				@"<image src='"+symbol+"vol.gif'>");

			sw.WriteLine("</body></html>");

			sw.Close();

		}

		/// <summary>
		/// Downloads a group of market data files from the Internet
		/// and saves them to a file.
		/// </summary>
		private void downloadWebPage()
		{
			StringBuilder URL,path;
			WebRequest request;
			Stream responseStream;
			string currentLine,symbol;
			StreamReader sr;
			bool atEnd=false;
			int numberOfLines=0;
			string stockList="";

			//Select stock list.
			switch(lbStockList.SelectedIndex)
			{
				case 0:
					stockList=@"C:\daddy\MathCom\StockList.txt";
					break;
				case 1:
					stockList=@"C:\daddy\MathCom\SP500.txt";
					break;
			}

			//Find out how many lines are in the stock list file.
			sr=new StreamReader(stockList);
			do
			{
				currentLine=sr.ReadLine();
				if(currentLine==""||currentLine==null)
					atEnd=true;
				else numberOfLines+=1;
			}
			while(!atEnd);

			progressBar1.Maximum=numberOfLines;

			//Reset file pointer to the beginning.
			sr.BaseStream.Seek(0, SeekOrigin.Begin);
			sr.BaseStream.Position = 0;

			//Download one web page for each stock symbol in the StockList.
			path=new StringBuilder();
			URL=new StringBuilder();
			for(int i=0; i<numberOfLines; i++)
			{
				symbol=sr.ReadLine();

				path.Remove(0,path.Length);
				URL.Remove(0,URL.Length);

				path.Append(@"C:\Documents and Settings\All Users\Documents\NYAReader\Data\");
				path.Append(symbol+".bin");

				//Find out when file was last updated.
				DateTime lastUpdate;
				if(File.Exists(path.ToString()))
				{
					Stream oldFile=File.OpenRead(path.ToString());
					BinaryReader br=new BinaryReader(oldFile);
					br.BaseStream.Seek(-32,SeekOrigin.End);
					int month=br.ReadInt32();
					int day=br.ReadInt32();
					int year=br.ReadInt32();
					lastUpdate=new DateTime(year,month,day);

					oldFile.Close();
					br.Close();
				}
				else
					lastUpdate=new DateTime(1990,1,1);
				DateTime today=DateTime.Today;
				if(lastUpdate.Day==today.Day&&lastUpdate.Month==today.Month&&
					lastUpdate.Year==today.Year)
					return;

				//Download data starting from the day after the last update.
				URL.Append("http://table.finance.yahoo.com/table.csv?a=" + lastUpdate.Month
					+ "&b=" + lastUpdate.Day+1 + "&c="+lastUpdate.Year+"&d=" + today.Month
					+ "&e=" + today.Day + "&f=" + today.Year + "&s=");
				URL.Append(symbol+"&y=0&g=d&ignore=.csv");
				
				request=WebRequest.Create(URL.ToString());
				responseStream=request.GetResponse().GetResponseStream();

				//Save to disk.
				writeBinary(responseStream,path.ToString());

				progressBar1.Value++;
			}

			sr.Close();
			progressBar1.Value=0;

		}

		/// <summary>
		/// Draws a vertical or horizontal tick mark (short line)
		/// centered on a certain point.
		/// </summary>
		/// <param name="g">Graphics object used for drawing.</param>
		/// <param name="pen">Pen used to draw the line.</param>
		/// <param name="ctrPoint">Point that the tick is
		/// centered on.</param>
		/// <param name="verticalTick">Indicates whether the
		/// tick should be drawn vertically or horizontally. If verticalTick is true,
		/// the tick will be drawn vertically.</param>
		/// <param name="length">The length of one half of
		/// the tick mark.</param>
		private void drawTick(Graphics g, Pen pen,Point ctrPoint,
			bool verticalTick,int length)
		{
			Point p1,p2;
			
			if(verticalTick==true)
			{
				p1=new Point(ctrPoint.X,ctrPoint.Y-length);
				p2=new Point(ctrPoint.X,ctrPoint.Y+length);
			}
			else
			{
				p1=new Point(ctrPoint.X-length,ctrPoint.Y);
				p2=new Point(ctrPoint.X+length,ctrPoint.Y);
			}

			g.DrawLine(pen,p1,p2);
		}

		/// <summary>
		/// Rounds a double to the nearest int.
		/// </summary>
		/// <param name="d">The double to be rounded</param>
		/// <returns>The double rounded to an int.</returns>
		private int roundToInt(double d)
		{
			return((int)(d+0.5));
		}

		private int roundToInt(decimal d)
		{
			return((int)(d+0.5M));
		}

		/// <summary>
		/// Writes a binary file from a Stream of market data.
		/// </summary>
		/// <param name="data">Stream of market data from the Internet.</param>
		private void writeBinary(Stream dataStream,string path)
		{
			//Create array of strings from data Stream.
			StreamReader sr=new StreamReader(dataStream);
			bool atEnd=false;
			string[][] data;
			string[] line=new string [10000];
			int numberOfLines=0;
			int x=0;
			sr.ReadLine(); //First line not needed.
			while(!atEnd)
			{
				line[x]=sr.ReadLine();
				if(line[x]==null)
					atEnd=true;
				else
				{
					numberOfLines++;
					x++;
				}
			}
			sr.Close();
			data=new String [numberOfLines][];

			for(int i=0; i<numberOfLines; i++)
			{
				data[i]=line[i].Split(',');
			}

			DateTime[] dates=new DateTime[data.GetLength(0)];
			for(int i=0; i<data.GetLength(0); i++)
			{
				dates[i]=DateTime.Parse(data[i][0]);
			}

			//Get array of other data.
			float[] open=new float[data.GetLength(0)];
			float[] high=new float[data.GetLength(0)];
			float[] low=new float[data.GetLength(0)];
			float[] close=new float[data.GetLength(0)];
			int[] volume=new int[data.GetLength(0)];
			for(int i=0; i<data.GetLength(0); i++)
			{
				open[i]=float.Parse(data[i][1]);
				high[i]=float.Parse(data[i][2]);
				low[i]=float.Parse(data[i][3]);
				close[i]=float.Parse(data[i][4]);
				volume[i]=int.Parse(data[i][5]);
			}
			
			//Reverse values so that earliest date comes first.
			Array.Reverse(dates);
			Array.Reverse(open);
			Array.Reverse(high);
			Array.Reverse(low);
			Array.Reverse(close);
			Array.Reverse(volume);

			//Write file.
			BinaryWriter bw;
			FileStream output;
			if(!File.Exists(path))
			{
				output=new FileStream(path, FileMode.CreateNew);
				bw=new BinaryWriter(output);
				bw.Write(numberOfLines);
			}
			else
			{
				output=new FileStream(path,FileMode.Open);
				BinaryReader br=new BinaryReader(output);
				int oldRows=br.ReadInt32();
				br.Close();
				output.Close();
				output=new FileStream(path,FileMode.OpenOrCreate);
				bw=new BinaryWriter(output);
				bw.BaseStream.Seek(0,SeekOrigin.Begin);
				oldRows+=numberOfLines;
				bw.Write(oldRows);
				bw.BaseStream.Seek(0,SeekOrigin.End);
			}
			for(int i=0; i<dates.Length; i++)
			{
				bw.Write(dates[i].Month);
				bw.Write(dates[i].Day);
				bw.Write(dates[i].Year);
				bw.Write(open[i]);
				bw.Write(high[i]);
				bw.Write(low[i]);
				bw.Write(close[i]);
				bw.Write(volume[i]);
			}
			bw.BaseStream.Seek(0,SeekOrigin.Begin);
			bw.Close();
			output.Close();
		}

		/// <summary>
		/// Calculates the percentile for a value within an array
		/// of values
		/// </summary>
		/// <param name="array">An array of values.</param>
		/// <param name="val">The value to calculate the percentile of.</param>
		/// <returns>The percentile of the value within the array.</returns>
		private float percentile(float[] array,float val)
		{
			int greaterThan=0;
			foreach(int i in array)
				if(val>i)
					greaterThan++;
			float percentile=(float)greaterThan/array.Length*100F;
			return percentile;
		}

		/// <summary>
		/// Finds the value for a certain percentile in an array.
		/// </summary>
		/// <param name="array">The array to be used in the calculation</param>
		/// <param name="percentile">The percentile that the returned value
		/// should be.</param>
		/// <returns>A value that is the given percentile in the array.</returns>
		private float percentileReverse(float[] array,float percentile)
		{
			Array.Sort(array,0,array.Length);
			//Find how many values the number must be greater than.
			int greater=(int)(Math.Round((decimal)(percentile/100*array.Length),0));
			float a=array[greater-1];
			float b=array[greater];
			float val=(a+b)/2F;
			return val;
		}

		private void btnGraph_Click(object sender, System.EventArgs e)
		{
			StreamReader sr;
			string currentLine;
			int numberOfLines=0;
			bool atEnd=false;
			string symbol="",stockList="";
			StringBuilder path=new StringBuilder(),fileName=new StringBuilder();

			//Select stock list.
			switch(lbStockList.SelectedIndex)
			{
				case 0:
					stockList=@"C:\daddy\MathCom\StockList.txt";
					break;
				case 1:
					stockList=@"C:\daddy\MathCom\SP500.txt";
					break;
			}

			//Find out how many lines are in the stock list file.
			sr=new StreamReader(stockList);
			do
			{
				currentLine=sr.ReadLine();
				if(currentLine==""||currentLine==null)
					atEnd=true;
				else numberOfLines+=1;
			}
			while(!atEnd);

			progressBar1.Maximum=numberOfLines;

			//Reset file pointer to the beginning.
			sr.BaseStream.Seek(0, SeekOrigin.Begin);
			sr.BaseStream.Position = 0;

			//Generate three graphs for each stock symbol.
			for(int i=0; i<numberOfLines; i++)
			{
				//Close graph.
				symbol=sr.ReadLine();
				fileName.Remove(0,fileName.Length);
				fileName.Append(@"C:\Documents and Settings\All Users\Documents\NYAReader\Generated Pages\");
				fileName.Append(symbol);
				fileName.Append("close.gif");
				path.Append(@"C:\Documents and Settings\All Users\Documents\NYAReader\Data\");
				path.Append(symbol);
				path.Append(".bin");
				string[,] data=readFile(path.ToString());
				DateTime[] dates=new DateTime[data.GetLength(0)];
				float[] yData=new float[data.GetLength(0)];
				for(int j=0;j<data.GetLength(0); j++)
				{
					dates[j]=DateTime.Parse(data[j,0]);
					yData[j]=float.Parse(data[j,4]);
				}
				drawGraph(dates,yData,fileName.ToString(),10,1,0,Color.Red,false,"Close",
					symbol+" Close",0);

				//Volume graph.
				fileName.Remove(0,fileName.Length);
				fileName.Append(@"C:\Documents and Settings\All Users\Documents\NYAReader\Generated Pages\");
				fileName.Append(symbol);
				fileName.Append("vol.gif");
				for(int j=0;j<data.GetLength(0); j++)
				{
					yData[j]=float.Parse(data[j,5]);
				}
				drawGraph(dates,yData,fileName.ToString(),10,1,0,Color.Blue,true,
					"Volume (x 1,000,000)",symbol+" Volume",0);

				//Volatility graph.
				fileName.Remove(0,fileName.Length);
				fileName.Append(@"C:\Documents and Settings\All Users\Documents\NYAReader\Generated Pages\");
				fileName.Append(symbol);
				fileName.Append("volatility.gif");
				yData=calculateStats(data)[6];
				drawGraph(dates,yData,fileName.ToString(),1F,0.5F,0,Color.Green,false,
					"Volatility (%)",symbol+" Volatility\nPast "+
					numericUpDown1.Value+" Days",1);

				path.Remove(0,path.Length);
				fileName.Remove(0,fileName.Length);
				progressBar1.Value++;
			}
			sr.Close();
			progressBar1.Value=0;

		}

		private void btnDownload_Click(object sender, System.EventArgs e)
		{
			downloadWebPage();
		}
		/// <summary>
		/// Removes data from an array of x-axis DateTimes for a graph
		/// so that only the most recent days are graphed. Number of days not removed
		/// is shown in numericUpDown2.
		/// </summary>
		/// <param name="data">An array of x-axis DateTimes to have data removed from.
		/// </param>
		/// <returns>The same array of DateTimes, but with data removed.</returns>
		private DateTime[] removeData(DateTime[] data)
		{
			if(numericUpDown2.Value>data.GetLength(0))
				return data;
			else
			{
				DateTime[] data2=new DateTime [(int)numericUpDown2.Value];
				for(int i=0; i<numericUpDown2.Value; i++)
				{
					data2[i]=data[i];
				}
				return data2;
			}
		}

		private void cbUseAllData_CheckedChanged(object sender, System.EventArgs e)
		{
			if (cbUseAllData.Checked)
				numericUpDown2.Enabled=false;
			else
				numericUpDown2.Enabled=true;
		}

		/// <summary>
		/// Removes data from an array of y-axis values for a graph
		/// so that only the most recent days are graphed. Number of days not removed
		/// is shown in numericUpDown2.
		/// </summary>
		/// <param name="data">An array of y-axis values to have data removed from.</param>
		/// <returns>The same array of values, but with data removed.</returns>
		private float[] removeData(float[] data)
		{
			if (numericUpDown2.Value>data.GetLength(0))
				return data;
			else
			{
				float[] data2=new float [(int)numericUpDown2.Value];
				for(int i=0; i<numericUpDown2.Value; i++)
				{
					data2[i]=data[i];
				}
				return data2;
			}
		}

		private void generateSPPage()
		{
			//Generate color scale.
			Color[] colors=new Color[400];

			//Start with full red,no blue, and increasing green.
			for(int i=0; i<100; i++)
			{
				colors[i]=Color.FromArgb(100,255,roundToInt(2.55*i),0);
			}

			//Continue with max green, no blue, and decreasing red.
			for(int i=100; i<200; i++)
			{
				colors[i]=Color.FromArgb(100, 255 - roundToInt(2.55*(i-100)),255,0);
			}

			//Next 100 colors have no red, max green, and increasing blue.
			for(int i=200; i<300; i++)
			{
				colors[i]=Color.FromArgb(100,0,255,roundToInt(2.55*(i-200)));
			}

			//Last 100 colors have no red, max blue, and decreasing green.
			for(int i=300; i<400; i++)
			{
				colors[i]=Color.FromArgb(100,0,255 - roundToInt(2.55*(i-300)),255);
			}
			
			//Make color scale image.
			Bitmap colorScale=new Bitmap(100,400);
			Graphics g=Graphics.FromImage(colorScale);
			g.Clear(Color.White);
			for(int i=0; i<400; i++)
				{
					g.DrawLine(new Pen(colors[i],1),0,i,30,i);
				}
			g.DrawLine(new Pen(Color.Black,1),0,200,30,200);
			g.DrawString("100 % Gain",new Font("Times New Roman",10),
				new SolidBrush(Color.Black),35,0);
			g.DrawString("0 % Gain",new Font("Times New Roman",10),
				new SolidBrush(Color.Black),35,190);
			g.DrawString("100 % Loss",new Font("Times New Roman",10),
				new SolidBrush(Color.Black),35,380);
			g.Dispose();
			colorScale.Save(@"C:\Documents and Settings\All Users\Documents\NYAReader\Generated Pages\colorScale.jpg",
				ImageFormat.Jpeg);
			
			//Pick the right background color for each stock symbol.
			Color[] bgColors=new Color[500];
			float gain;
			StreamReader sr=new StreamReader(
				@"C:\Documents and Settings\All Users\Documents\NYAReader\Data\colorStats.txt");
			for(int i=0; i<500; i++)
			{
				gain=float.Parse(sr.ReadLine());

				//Round to nearest half.
				if(Math.Abs(gain-(int)gain)<0.25)
						gain=(int)gain;
				if(Math.Abs(gain-(int)gain)>=0.25 && Math.Abs(gain-(int)gain)<0.75)
				{
					if(gain>0)
						gain=(int)gain+0.5F;
					if(gain<0)
						gain=(int)gain-0.5F;
				}
				if(Math.Abs(gain-(int)gain)>=0.75)
				{
					if(gain>0)
						gain=(int)gain+1;
					if(gain<0)
						gain=(int)gain-1;
				}

				if(gain>100)
					bgColors[i]=colors[0];
				if(gain < -100)
					bgColors[i]=colors[400];
				if(gain >= -100 && gain <= 100)
					bgColors[i]=colors[200-(int)(gain*2)];
			}
			sr.Close();
			
			//Web page.
			sr=new StreamReader(@"C:\daddy\MathCom\SP500.txt");
			StreamWriter sw=new StreamWriter
				(@"C:\Documents and Settings\All Users\Documents\NYAReader\Generated Pages\SP500.html");
			string symbol;
			sw.WriteLine("<html><head><title>S&P 500 Components</title></head><body>");
			sw.WriteLine("<h1><center>S&P 500 Components</center></h1>");
			sw.WriteLine("<table border=1 align=right");
			int colorIndex=0;
			for(int i=0; i<50; i++)
			{
				sw.WriteLine("<tr>");

				for(int j=0; j<10; j++)
				{
					symbol=sr.ReadLine();
					sw.WriteLine("<td bgcolor=#" +toHexColorString(bgColors[colorIndex])
						+ "><a href='" +symbol+ ".html'>" +symbol+ "</a></td>");
					colorIndex++;
				}
				sw.WriteLine("</tr>");
			}
			sw.WriteLine("</table>");
			sw.WriteLine("<image src='colorScale.jpg' width=100 height=400>");
			sw.WriteLine("</body></html>");

			sw.Close();
			sr.Close();
		}

		private void btnGenSPPage_Click(object sender, System.EventArgs e)
		{
			generateSPPage();
		}

		private string[][] getSPData(bool download)
		{
			//Download and save page.
			if(download==true)
			{
				WebRequest request=WebRequest.Create("http://www.spglobal.com/sp500.csv");
				Stream responseStream=request.GetResponse().GetResponseStream();
				StreamReader sr2=new StreamReader(responseStream);
				string responseString=sr2.ReadToEnd();
				sr2.Close();
				StreamWriter sw=new StreamWriter
					(@"C:\Documents and Settings\All Users\Documents\NYAReader\Data\SPData.csv");
				sw.Write(responseString);
				sw.Close();
			}

			//Get stock symbols.
			String[][] symbols=new String[600][];
			bool atEnd=false;
			string line;
			int i=0;
			StreamReader sr=new StreamReader(@"C:\Documents and Settings\All Users\Documents\NYAReader\Data\SPData.csv");
			for(int j=0; j<5; j++) //First 5 lines are not needed.
			{
				sr.ReadLine();
			}
			while(atEnd==false)
			{
				line=sr.ReadLine();
				if(line==null)
					atEnd=true;
				else
					symbols[i]=csvSplit(line);
				i++;
			}
			sr.Close();

			return symbols;
			
		}

		private void btnMakePage_Click(object sender, System.EventArgs e)
		{
			string stockList="";
			bool atEnd=false;
			string currentLine="";
			int numberOfLines=0;
			string symbol="";
			StringBuilder path=new StringBuilder(), fileName=new StringBuilder();

			//Select stock list.
			switch(lbStockList.SelectedIndex)
			{
				case 0:
					stockList=@"C:\daddy\MathCom\StockList.txt";
					break;
				case 1:
					stockList=@"C:\daddy\MathCom\SP500.txt";
					break;
			}

			//Find out how many lines are in the stock list file.
			StreamReader sr=new StreamReader(stockList);
			do
			{
				currentLine=sr.ReadLine();
				if(currentLine==""||currentLine==null)
					atEnd=true;
				else numberOfLines+=1;
			}
			while(!atEnd);

			progressBar1.Maximum=numberOfLines;

			//Reset file pointer to the beginning.
			sr.BaseStream.Seek(0, SeekOrigin.Begin);
			sr.BaseStream.Position = 0;

			//Generate one web page for each stock symbol.
			for(int i=0; i<numberOfLines; i++)
			{
				//Web page.
				symbol=sr.ReadLine();
				path.Append(@"C:\Documents and Settings\All Users\Documents\NYAReader\Data\");
				path.Append(symbol);
				path.Append(".bin");
				fileName.Append(@"C:\Documents and Settings\All Users\Documents\NYAReader\Generated Pages\");
				fileName.Append(symbol);
				fileName.Append(".html");
				this.generateWebPage(path.ToString(),fileName.ToString(),symbol);

				fileName.Remove(0,fileName.Length);
				path.Remove(0,path.Length);
				progressBar1.Value++;
			}
			sr.Close();
			progressBar1.Value=0;
		}

		private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
		{
			//Save values in textboxes, etc., for next running of program.
			const string path=
				@"C:\Documents and Settings\All Users\Documents\NYAReader\options.txt";
			FileStream fs=new FileStream(path,FileMode.Create);
			StreamWriter sw=new StreamWriter(fs);
			sw.WriteLine(numericUpDown1.Value.ToString());
			sw.WriteLine(numericUpDown2.Value.ToString());
			sw.WriteLine(numericUpDown3.Value.ToString());
			sw.WriteLine(cbUseAllData.Checked.ToString());
			sw.WriteLine(lbStockList.SelectedIndex.ToString());
			sw.Close();

			//Save percent gain in past 5 days for each stock. This data is
			//used in the color-coded S&P 500 table.
			StreamReader sr=new StreamReader(@"C:\daddy\MathCom\SP500.txt");
			BinaryReader br;
			sw=new StreamWriter(@"C:\Documents and Settings\All Users\Documents\NYAReader\Data\colorStats.txt");
			string symbol;
			float close1,close2,percentChange;
			FileStream s;
			for(int i=0; i<500; i++)
			{
				symbol=sr.ReadLine();
				s=new FileStream(@"C:\Documents and Settings\All Users\Documents\NYAReader\Data\"
					+ symbol+".bin",FileMode.Open);

				br=new BinaryReader(s);
				br.BaseStream.Seek(-136,SeekOrigin.End);
				close1=br.ReadSingle();
				br.BaseStream.Seek(-8,SeekOrigin.End);
				close2=br.ReadSingle();
				br.BaseStream.Seek(-32,SeekOrigin.End);
				int m=br.ReadInt32();
				int d=br.ReadInt32();
				int y=br.ReadInt32();
				MessageBox.Show(m.ToString()+" "+d.ToString()+" "+y.ToString());
				br.Close();

				percentChange=(close2-close1)/close1*100;
				sw.WriteLine(percentChange.ToString());
			}
			sr.Close();
			sw.Close();
		}

		private void btnDownloadQuotes_Click(object sender, System.EventArgs e)
		{
			//Maximum of 4 symbols per download.
			string begin="http://finance.yahoo.com/d/quotes.csv?s=";
			string end="&f=s|1d1t1c1ohgv&e=.csv";
			StringBuilder URL=new StringBuilder();
			StreamReader sr=new StreamReader(@"C:\daddy\MathCom\SP500.txt");
			WebRequest request;
			Stream[] responseStream=new Stream[125];
			progressBar1.Maximum=125;
			for(int i=0; i<125; i++)
			{
				URL.Append(begin);
				for(int j=0; j<4; j++)
				{
					URL.Append(sr.ReadLine());
					if (j<3)
						URL.Append("+");
				}
				URL.Append(end);
				request=WebRequest.Create(URL.ToString());
				responseStream[i]=request.GetResponse().GetResponseStream();

				URL.Remove(0,URL.Length);
				progressBar1.Value++;
			}
			sr.Close();

			//Save to disk.
			string[] responseString=new string[125];
			for(int i=0; i<125; i++)
			{
				sr=new StreamReader(responseStream[i]);
				responseString[i]=sr.ReadToEnd();
				sr.Close();
			}
			StreamWriter sw=new StreamWriter
				(@"C:\Documents and Settings\All Users\Documents\NYAReader\Data\quotes.csv");
			for(int i=0; i<125; i++)
			{
				sw.Write(responseString[i]);
			}
			sw.Close();
			progressBar1.Value=0;

		}

		private void btnDownloadSP_Click(object sender, System.EventArgs e)
		{
			string[][]data=getSPData(true);
			StreamWriter sw=new StreamWriter(@"C:\daddy\MathCom\SP500.txt");
			for(int i=0;i<500;i++)
			{
				sw.WriteLine(data[i][0]);
			}
			sw.Close();

		}

		private string[] csvSplit(string s)
		{
			StringReader sr=new StringReader(s);
			string[] array=new string[100];
			int i=0;
			bool atEnd=false,endQuote=false;
			char c,d;
			while(!atEnd)
			{
				
				c=(char)sr.Read();

				//Read() returns -1 if it reaches the end of the string.
				//-1 as a character is a question mark.
				if(c=='?' || c==(char)65535)
					atEnd=true;
				else
				{
					switch(c)
					{
						case '"':
							while(!endQuote)
							{
								d=(char)sr.Read();
								if(d == '"')
								{
									endQuote=true;
								}
								else
								{
									array[i]+=d;
								}
							}
							break;
					
						case ',':
							i++;
							break;

						default:
							array[i]+=c;
							break;
					}
				}
			}
			return array;
		}

		private string toHexColorString(Color color)
		{
			int[]a=new int[3];
			a[0]=color.R;
			a[1]=color.G;
			a[2]=color.B;
			string[] b=new string[3];
			int x;
			for(int i=0; i<3; i++)
			{
				if(a[i]<16)
				{
					if(a[i]<10)
						b[i]="0" + a[i].ToString();
					if(a[i]==10)
						b[i]="0A";
					if(a[i]==11)
						b[i]="0B";
					if(a[i]==12)
						b[i]="0C";
					if(a[i]==13)
						b[i]="0D";
					if(a[i]==14)
						b[i]="0E";
					if(a[i]==15)
						b[i]="0F";
				}
				if(a[i]>=16 && a[i]<32)
				{
					x=a[i]-16;
					if(x<10)
						b[i]="1" + x.ToString();
					if(x==10)
						b[i]="1A";
					if(x==11)
						b[i]="1B";
					if(x==12)
						b[i]="1C";
					if(x==13)
						b[i]="1D";
					if(x==14)
						b[i]="1E";
					if(x==15)
						b[i]="1F";
				}
				if(a[i]>=32 && a[i]<48)
				{
					x=a[i]-32;
					if(x<10)
						b[i]="2" + x.ToString();
					if(x==10)
						b[i]="2A";
					if(x==11)
						b[i]="2B";
					if(x==12)
						b[i]="2C";
					if(x==13)
						b[i]="2D";
					if(x==14)
						b[i]="2E";
					if(x==15)
						b[i]="2F";
				}
				if(a[i]>=48 && a[i]<64)
				{
					x=a[i]-48;
					if(x<10)
						b[i]="3" + x.ToString();
					if(x==10)
						b[i]="3A";
					if(x==11)
						b[i]="3B";
					if(x==12)
						b[i]="3C";
					if(x==13)
						b[i]="3D";
					if(x==14)
						b[i]="3E";
					if(x==15)
						b[i]="3F";
				}
				if(a[i]>=64 && a[i]<80)
				{
					x=a[i]-64;
					if(x<10)
						b[i]="4" + x.ToString();
					if(x==10)
						b[i]="4A";
					if(x==11)
						b[i]="4B";
					if(x==12)
						b[i]="4C";
					if(x==13)
						b[i]="4D";
					if(x==14)
						b[i]="4E";
					if(x==15)
						b[i]="4F";
				}
				if(a[i]>=80 && a[i]<96)
				{
					x=a[i]-80;
					if(x<10)
						b[i]="5" + x.ToString();
					if(x==10)
						b[i]="5A";
					if(x==11)
						b[i]="5B";
					if(x==12)
						b[i]="5C";
					if(x==13)
						b[i]="5D";
					if(x==14)
						b[i]="5E";
					if(x==15)
						b[i]="5F";
				}
				if(a[i]>=96 && a[i]<112)
				{
					x=a[i]-96;
					if(x<10)
						b[i]="6" + x.ToString();
					if(x==10)
						b[i]="6A";
					if(x==11)
						b[i]="6B";
					if(x==12)
						b[i]="6C";
					if(x==13)
						b[i]="6D";
					if(x==14)
						b[i]="6E";
					if(x==15)
						b[i]="6F";
				}
				if(a[i]>=112 && a[i]<128)
				{
					x=a[i]-112;
					if(x<10)
						b[i]="7" + x.ToString();
					if(x==10)
						b[i]="7A";
					if(x==11)
						b[i]="7B";
					if(x==12)
						b[i]="7C";
					if(x==13)
						b[i]="7D";
					if(x==14)
						b[i]="7E";
					if(x==15)
						b[i]="7F";
				}
				if(a[i]>=128 && a[i]<144)
				{
					x=a[i]-128;
					if(x<10)
						b[i]="8" + x.ToString();
					if(x==10)
						b[i]="8A";
					if(x==11)
						b[i]="8B";
					if(x==12)
						b[i]="8C";
					if(x==13)
						b[i]="8D";
					if(x==14)
						b[i]="8E";
					if(x==15)
						b[i]="8F";
				}
				if(a[i]>=144 && a[i]<160)
				{
					x=a[i]-144;
					if(x<10)
						b[i]="9" + x.ToString();
					if(x==10)
						b[i]="9A";
					if(x==11)
						b[i]="9B";
					if(x==12)
						b[i]="9C";
					if(x==13)
						b[i]="9D";
					if(x==14)
						b[i]="9E";
					if(x==15)
						b[i]="9F";
				}
				if(a[i]>=160 && a[i]<176)
				{
					x=a[i]-160;
					if(x<10)
						b[i]="A" + x.ToString();
					if(x==10)
						b[i]="AA";
					if(x==11)
						b[i]="AB";
					if(x==12)
						b[i]="AC";
					if(x==13)
						b[i]="AD";
					if(x==14)
						b[i]="AE";
					if(x==15)
						b[i]="AF";
				}
				if(a[i]>=176 && a[i]<192)
				{
					x=a[i]-176;
					if(x<10)
						b[i]="B" + x.ToString();
					if(x==10)
						b[i]="BA";
					if(x==11)
						b[i]="BB";
					if(x==12)
						b[i]="BC";
					if(x==13)
						b[i]="BD";
					if(x==14)
						b[i]="BE";
					if(x==15)
						b[i]="BF";
				}
				if(a[i]>=192 && a[i]<208)
				{
					x=a[i]-192;
					if(x<10)
						b[i]="C" + x.ToString();
					if(x==10)
						b[i]="CA";
					if(x==11)
						b[i]="CB";
					if(x==12)
						b[i]="CC";
					if(x==13)
						b[i]="CD";
					if(x==14)
						b[i]="CE";
					if(x==15)
						b[i]="CF";
				}
				if(a[i]>=208 && a[i]<224)
				{
					x=a[i]-208;
					if(x<10)
						b[i]="D" + x.ToString();
					if(x==10)
						b[i]="DA";
					if(x==11)
						b[i]="DB";
					if(x==12)
						b[i]="DC";
					if(x==13)
						b[i]="DD";
					if(x==14)
						b[i]="DE";
					if(x==15)
						b[i]="DF";
				}
				if(a[i]>=224 && a[i]<240)
				{
					x=a[i]-224;
					if(x<10)
						b[i]="E" + x.ToString();
					if(x==10)
						b[i]="EA";
					if(x==11)
						b[i]="EB";
					if(x==12)
						b[i]="EC";
					if(x==13)
						b[i]="ED";
					if(x==14)
						b[i]="EE";
					if(x==15)
						b[i]="EF";
				}
				if(a[i]>=240)
				{
					x=a[i]-240;
					if(x<10)
						b[i]="F" + x.ToString();
					if(x==10)
						b[i]="FA";
					if(x==11)
						b[i]="FB";
					if(x==12)
						b[i]="FC";
					if(x==13)
						b[i]="FD";
					if(x==14)
						b[i]="FE";
					if(x==15)
						b[i]="FF";
				}
			}
			string hexString=b[0]+b[1]+b[2];
			return hexString;
		}
	}
}