I just discovered (very happily) there are many Python frameworks for IB, which ones are best for back test and automated trading? A good framework IMO should be: 1. Open source is preferred. 2. A long development history. I don't want to learn a system that's abandoned soon. 3. Widely used with a big developer base. 4. A community such as a forum is a big plus. 5. Robust, flexible, etc. 6. Back-test is more important than live trading for me at the stage.