DataFeed for Tradingview
Here is a link to a datafeed which will allow you to ingest Tradingview data and signals into Backtrader. It uses a flask server to listen out for webhook alerts sent from Tradingview's. You should be able to use it to receive signals, data or both.
No backfilling though :)
The idea is to be able to ingest TV signals and act on them with your broker of choice.
You will need to be comfortable with a bit of port forwarding to get it to work.