Win Rate Calculator — Minimum Win Rate to Be Profitable

It depends entirely on your R:R ratio. At 1:1 R:R, you need above 50% win rate. At 1:2, above 33.3%. At 1:3, above 25%. This is why traders with low win rates (30–40%) can still be profitable — if their average winner is much larger than their average loser.

Expected value is the average profit or loss per trade over many repetitions. EV = (Win Rate × Avg Win) − (Loss Rate × Avg Loss). A positive EV means the strategy is profitable over large sample sizes. A negative EV means it will lose money regardless of short-term results.

Neither is inherently better — what matters is positive expected value. A 70% win rate with 1:0.5 R:R has the same EV as a 33% win rate with 1:2. Professional traders often prefer lower win rates with higher R:R because larger winners are psychologically easier to hold.

Statistical significance requires at least 100 trades, preferably 200+. With fewer trades, random variance makes it impossible to know if your win rate reflects real edge or luck. Track every trade in a journal and calculate your true win rate from live data.

A 50% win rate is perfectly profitable if your average winning trade is larger than your average losing trade. At 50% win rate with 1:2 R:R, your expected value per trade = (0.5 × 2) − (0.5 × 1) = +0.5 units of risk per trade — a positive edge. Many professional trend-following systems win only 35–45% of trades but remain profitable because winners far exceed losers in size.