Free tool or platform for F&O Back testing

Is there any platform / tool that offers free F&O trades back testing?

quantman.in

This is not free. Original post asked for free tool.

there is 50 backtest credit avaialble for free, life time free no platform available for backtesting or you can user virtual trading on sensibull by zerodha

I checked that 30 days free for approx 2000 credits when logged via broker. Lifetime free I don’t see.

Also sensibull is only for analyzing, placing trades in real & virtual trades, no back testing option

I use opstra from defineedge for back testing which is good. I had requested the backtesting feature on Sensibull long time back and it is still pending. No sure if they will ever implement it.