Win Rate vs Payoff
A 30%-win strategy can crush a 70%-win one. Why win rate alone tells you almost nothing.
Win rateThe percentage of trades that are profitable. (the % of trades that profit) is the most quoted — and most misleading — statistic in trading. On its own it tells you almost nothing about whether a strategy makes money, because it ignores the size of wins versus losses (the payoff).
The liberating truth (revisited from expectancyThe average profit or loss you can expect per trade., now made central): *win rateThe percentage of trades that are profitable. and payoff are two halves of one equation, and either can dominate.* A strategy that wins only 30% of the time can crush one that wins 70%, if its winners are far larger than its losers. The two are linked by a simple identity — to break even, your required win rateThe percentage of trades that are profitable. falls as your payoff (avg win ÷ avg loss) rises: at 1:1 payoff you need >50% wins; at 3:1 you need only >25%. So a low win rate is not a flaw — it’s often the signature of a trendThe prevailing direction of price: up, down or sideways.-following strategy that cuts losses small and lets winners run huge. Conversely, a seductive 80% win rate can hide negative expectancyThe average profit or loss you can expect per trade. if the rare losses are catastrophic (the optionThe right, not the obligation, to buy or sell at a set price.-seller trap). Always read win rate and payoff together — usually via expectancy or **profit factorGross profit divided by gross loss across all trades.** (gross profit ÷ gross loss) — never win rate alone.
- Win rateThe percentage of trades that are profitable. alone is empty — it says nothing about win/loss sizes, so it can’t tell you if a strategy is profitable.
- The trade-off — higher payoff (avg win ÷ avg loss) lowers the win rateThe percentage of trades that are profitable. you need to profit (3:1 → just >25% wins).
- Low win rateThe percentage of trades that are profitable. ≠ bad — it’s the natural signature of cut-losses-short, let-winners-run (trendThe prevailing direction of price: up, down or sideways.-following).
- Read together — use expectancyThe average profit or loss you can expect per trade. or *profit factorGross profit divided by gross loss across all trades.* (gross profit ÷ gross loss > 1 = profitable) instead of win rateThe percentage of trades that are profitable..
ExampleStrategy A wins 30%, avg win ₹5, avg loss ₹1 → expectancyThe average profit or loss you can expect per trade. = (0.3×5) − (0.7×1) = +₹0.80/trade, profit factorGross profit divided by gross loss across all trades. ≈ 2.1. Strategy B wins 70%, avg win ₹1, avg loss ₹3 → (0.7×1) − (0.3×3) = −₹0.20/trade, profit factorGross profit divided by gross loss across all trades. ≈ 0.78. The 30%-winner crushes the 70%-winner. Win rateThe percentage of trades that are profitable. told the opposite of the truth.
Key takeawayWin rateThe percentage of trades that are profitable. alone is nearly meaningless — it ignores payoff (win vs loss size). The two combine into expectancyThe average profit or loss you can expect per trade.: a higher payoff lowers the win rateThe percentage of trades that are profitable. you need (3:1 → >25%), so a 30%-win strategy can beat a 70%-win one. Judge by expectancyThe average profit or loss you can expect per trade. or profit factorGross profit divided by gross loss across all trades., never win rate alone.
FAQs
What is profit factor, and what’s a good value?
Profit factor = gross profit ÷ gross loss across all trades. Above 1 means profitable; ~1.5+ is generally solid, and ~2+ is strong (though very high values on small samples can signal overfitting). It’s a handy single number that, unlike win rate, already blends frequency and size of wins and losses.