Deadly Backtest Errors & Curve Fitting Traps 2026
The most common backtesting mistakes traders make often lead to devastating live trading failures. Overfitting (also known as curve fitting) tops the list in recent 2025-2026 discussions, where strategies appear flawless on historical data but crumble in real markets due to memorizing noise rather than capturing true edges. Other frequent backtest errors include look-ahead bias, […]










