fastbt is a simple and dirty way to do backtests based on end of day data, especially for day trading. The main purpose is to provide a simple framework to weed out bad strategies so that you could test and improve your better strategies further

It is based on the assumption that you enter into a position based on some pre-defined rules for a defined period and exit either at the end of the period or when stop loss is triggered. See the rationale for this approach and the built itinassumptions.

If your strategy gets you good results, then check them with a full featured backtesting framework such as zipline or backtrader to verify your results. If your strategy fails, then it would most probably fail in other environments.

fastbt lets you easily

This is very much alpha