What happens when your strategy stops working?
Market conditions change over time. How do you determine whether your strategy has lost its edge or is simply experiencing a losing period?
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Telling the difference between a normal losing period and a strategy losing its edge comes down to tracking your statistical sample size. A temporary drawdown matches your historical backtest metrics, whereas a broken edge shows up as a sustained shift in expectancy, win rate, or profit factor that deviates far beyond your expected maximum drawdown.
In prop firm trading, managing this distinction is crucial because strict daily loss limits and drawdown rules leave very little room for error while you diagnose a failing strategy. Dropping your position sizing or pausing live trading to paper trade through a shift in market conditions can save your account.
How do you personally measure when your edge has faded? Drop your thoughts below!
