I personally maintain and use this library for both, with most of my investing being passive, but using the more aggressive algorithms with a smaller part of my

I personally maintain and use this library for both, with most of my investing being passive, but using the more aggressive algorithms with a smaller part of my portfolio. At the least, on either side, it serves to remove the busy work for me (like rebalancing, tracking indicators, etc) and cut out the emotion. Part of me thinks that's a bridge faced when crossed (if plug-and-play strategies don't get much interest, no problem to solve), but my initial thoughts are limiting capital and preventing further investing in a strategy at a certain point. On the other hand "buy and hold top 500 stocks weighted by market cap" is a very common strategy that "still works", it just became the benchmark strategy (and so never beats the market by definition).