R-multiples
1R = your risk on a trade. A trade that makes 2× your risk is +2R. Judge performance in R, not money. Expectancy = (win% × avgWin_R) − (loss% × avgLoss_R). Positive expectancy + discipline = growth.
Why it matters
You can be profitable at a 40% win rate if winners are +2R and losers −1R. Chasing win-rate over R:R is a classic trap.