Hi! I'm new to QuantConnect and have really been enjoying the platform.

I'm wondering if there's a way to add custom metrics, specifically portfolio turnover, in the cloud platform, or would this best be done using LEAN? I see some mention of portfolio turnover in the repo, but these implementations appear to all be in C#. It also seems that this metric is available as an Alpha Stream Scoring Criteria but again I'm not sure how to port this over to a backtest.