Aggregate metrics lie. Your overall win rate is almost meaningless because it blends your A-setup planned trades with your reactive revenge trades, your best session hours with your worst, and your clear market conditions with choppy noise. To get useful analysis, you have to segment.
Start with four dimensions that consistently predict performance differences:
**By setup type:** Does your breakout trade expectancy differ from your mean-reversion expectancy? Almost always yes. Most traders have positive edge on one type and negative edge on another — but the aggregate hides it.
**By time of day:** Session timing affects both market conditions and trader state. The first and last 30 minutes of major sessions behave differently from midday. Compare your PnL and expectancy by hour bloc.
**By behavioral tag:** Planned trades vs. reactive trades is the single most predictive split. Pull these two cohorts and compare. Most traders find a meaningful edge gap — planned trades outperform by 40-80% on expectancy.
**By sequence:** What is your performance on the trade after a loss? After two consecutive losses? After a big winner? Sequence effects are real and measurable.