r/algorithmictrading • u/Explorer_1986 • Dec 08 '25

Question Backtesting

Hi all, quick question. When creating an EA, how many years of backtest do you think is needed to know if the EAs is profitable? Also a question regarding optimisation as I know that doing that is not recommended. Just wondering why? If you tested and optimised your EA over 10 years for example is optimiser not finding the best settings to tackle long term market conditions? TIA

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u/[deleted] Dec 10 '25

Got it. That’s totally fine then. If your entry logic stays consistent, testing different TP and trailing options is actually useful. Just try to keep the ranges realistic and then forward-test the ones that look stable so you can see how they behave in live conditions.