TA-Lib provides a large library of technical analysis functions for financial data. Includes indicators like MACD, RSI and Stochastic. Provides access to stock market data from ASCII files, SQL database or Yahoo!
TA-Lib includes a module to do performance measurements of tradings.
Works on Windows/Linux with Perl, .NET/Mono, C/C++ and Excel interface.
A Perl interface and new candlestick functions are included in this release. Intraday to intraday data conversion is now supported. Many bug fixes.
Download page: http://sourceforge.net/project/showfiles.php?group_id=8903
More Info: http://www.ta-lib.org