Lean VS zipline-reloaded

6.) You cant maximize position size of spread options strategies, LEAN always assumes naked margin first and ON THE NEXT DATA FRAME - you get your reg-t margin for spreads. https://github.com/QuantConnect/Lean/issues/5693 We're running into 2 years of this issue being reported.

Thanks. I will check it out. Can you point me to the right part of the codebase I should be looking at? I know it must be somewhere here - https://github.com/QuantConnect/Lean

They have nice documentation on their website for how to download/import external data, though. They even have GitHub examples that pull data from Dropbox.

Here is an example https://github.com/QuantConnect/Lean/blob/master/Algorithm.Python/DropboxUniverseSelectionAlgorithm.py

There's also the open-source lean.io stuff by QuantConnect which looks decent and comes with data. It's pretty inexpensive too.

I can plot OHCL lines, I can plot OHCL scatter points on the chart, why can't I plot candles? It's just those scatter points put together. This thing has been going on for 8 YEARS.

Here's a link to one of the strategy examples from the QC team that does this -- loading a universe from an external source. https://github.com/QuantConnect/Lean/blob/master/Algorithm.Python/DropboxCoarseFineAlgorithm.py

+1 see https://github.com/QuantConnect/Lean

another comment in here mentioned Zipline Reloaded¹, a fork from a guy who wrote a book using Zipline. Last commit 6 months ago, much better than 3 years from the original.

¹: https://github.com/stefan-jansen/zipline-reloaded

Stephen Jansen has resurrected both Zipline and Pyfolio following Quantopian's belly-up.

I'm assuming you want to create a backtesting environment. Check out zipline (https://zipline.ml4trading.io/).

If that's because Quantopian went belly-up and Zipline is not maintained anymore, check Stefan Jansen on Github, he's actively maintaining zipline-reloaded and pyfolio-reloaded.

https://zipline.ml4trading.io/ https://github.com/stefan-jansen/zipline-reloaded