No backtest data, just live trading access to API.
This is interesting. In theory, you could test strategies using some charting tool and transfer that into strategy that can trade directly with some of these brokers. Am I right in the assessment.
Yes... if you check this thread:
Import *.csv HLOCV to Backtest via Google Sheets
I'm already importing NASDAQ and S&P500 stock charts to the platform, both in 1Hz fashion and daily candle: HLOCV.
So I can build algo to anything here. All I need is API connection to trade. I could probably hack my own hole there... but admittedly I'm better with quant than networks.