PyAlgoTrade is a Python library for backtesting stock trading strategies. Let’s say you have an idea for a trading strategy and you’d like to evaluate it with historical data and see how it behaves. PyAlgoTrade allows you to do so with minimal effort.Quickstart
Very easy to scale horizontally, that is, using one or more computers to backtest a strategy.
You can even take advantage of Google's cloud computing infrastructure to run your strategies inside Google App Engine.
PyAlgoTrade is free, open source, and it is licensed under the Apache License, Version 2.0.