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Easy Financial Charting with Custom Formulas in C#

Discover how to create dynamic financial charts using our Easy Financial Chart library, designed for C#. This guide covers the essential components including CustomDraw, FormulaArea, and the integration of stock data from Yahoo Finance. Learn how to implement various technical indicators such as EMA, SAR, MACD, and RSI through straightforward scripting. With sample code, you'll understand how to fetch stock data, add custom formulas and indicators to your charts, and output them to a web browser efficiently.

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Easy Financial Charting with Custom Formulas in C#

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  1. programming guide of easy financial chart http://finance.easychart.net

  2. Easy financial chart class structures CustomDraw FormulaArea FormulaData FormulaChart FormulaPackage created by formular script FormulaArea FormulaArea FormulaData FormulaArea CustomDraw FormulaAxisX FormulaAxisY

  3. YahooDataManager:IDataManager FormulaPackage FML.NATIVE.EMA(10) … … BORL YAHO MSFT … … CSVDataProvider:IDataProvider FormulaPackage FML.NATIVE.EMA(50) FormulaArea FML.NATIVE.MAIN FormulaPackage FML.NATIVE.EMA(200) FormulaSkin Bind Bind FormulaPackage FML.SAR(10,2,20) FormulaChart … … FormulaArea FML.MACD(26,12,9) GetBitmap(…) SaveToStream(…) FormulaArea FML.RSI … … FML.NATIVE.MAIN,FML.MACD(26,12,9),FML.SAR(10,2,20) … … are from formula script system , can be compiled by our compiler.

  4. //Sample code FormulaChart fc = new FormulaChart(); //Create YahooDataManager , Get stock data from yahoo. YahooDataManager ydm = new YahooDataManager(); CSVDataProvider cdp = (CSVDataProvider)ydm[“MSFT”]; //Add stock lines to main stock view fc[0].AddFormula("FML.NATIVE.EMA(10)"); fc[0].AddFormula("FML.NATIVE.EMA(50)"); fc[0].AddFormula("FML.NATIVE.EMA(200)"); fc[0].AddFormula("FML.SAR(10,2,20)"); //Add indicators to stock chart fc.AddArea("FML.MACD(26,12,9)"); fc.AddArea("FML.RSI"); //Apply build-in stock chart skin fc.SetSkin(FormulaSkin.CyanGreen); //Bind stock data fc.DataProvider = cdp; //Output the chart to webbrowser fc.SaveToStream(Response.OutputStream, 640,480);

  5. Formula script sample: Below code is copy from basic_fml.xml MACD: DIFF : EMA(CLOSE,SHORT) - EMA(CLOSE,LONG); DEA : EMA(DIFF,M); MACD : 2*(DIFF-DEA), COLORSTICK This formula will create three line DIFF,DEA and MACD. Formula compiler can edit “native-en.xml” and compile the script to Basic_fml.cs and basic_fml.dll, basic_fml.cs can be compiled to Your main program, basic_fml.dll can be load on runtime. For more information about the formula script language, please see “formula-guide.htm”

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