Our backtesting engine, Zipline, is opensource - https://github.com/quantopian/zipline
Zipline was unveiled at PyData NYC, and the presentation materials are here: https://app.quantopian.com/posts/hello-from-pydata
Our backtesting engine, Zipline, is opensource - https://github.com/quantopian/zipline
Zipline was unveiled at PyData NYC, and the presentation materials are here: https://app.quantopian.com/posts/hello-from-pydata