<ul data-eligibleForWebStory="false">Backtesting trading strategies is crucial to avoid trading on instinct and falling for randomness.Confusing mean reversion with buying the dip or shorting the rip can lead to inconsistent returns without structure.Mean reversion works effectively when implemented systematically, not based on instincts.Using Python and the Zipline backtesting library can help build and test disciplined trading strategies for better results.