The ta-lib provides common functions for the technical analysis of
financial market data. Widely used by trading software developers
working with Excel, .NET, Java, Perl, Python or C/C++.

More than 150 technical analysis indicators such as ADX, MACD, RSI,
Stochastic, Bollinger Bands. Includes candlestick pattern recognition.
Optional abstract API allowing your code to adapt automatically when new
functions are added!