Does my algo trading include backtesting with win ratio with stock and forex

Here is some queries about back testing and win ratio reality. Does this same approach from cryptocurrency work with stocks or forex?

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What trading platform can I use your python script? Is your python script only good for Forex trading? Can I use your script to trade stock? Do you provide instruction to backtest your python script? What is winning rate? Do you provide any service for trading?

https://quantlabs.net/blog/2021/09/how-to-transition-from-mt4-platform-and-forex-cfd-trading-to-real-solid-performance/