What Profit Factor Actually Means (And Why Win Rate Is a Trap)

90% win rate. Still losing money.

That sounds impossible. But if your average win is $50 and your average loss is $600, you can win 9 trades and lose 1 — and walk away down $150. Win rate tells you how often you're right. It doesn't tell you anything about whether you're making money.

The Number That Actually Matters

The metric that actually matters is profit factor. It's simple: total gross profit divided by total gross loss. A profit factor of 1.5 means for every dollar you lose, you make $1.50. A profit factor of 2.0 means you make $2 per dollar lost. Anything below 1.0 means the strategy is losing money, full stop, regardless of what the win rate says.

Most traders have never heard of profit factor. They know their win rate because brokers display it prominently. Profit factor you have to calculate yourself, which is probably why it gets ignored.

Richard Dennis ran the Turtle Trading experiment in the early 1980s. He took 23 complete beginners and taught them his trend-following system. Over five years, that group made $175 million in profits — on a win rate of roughly 35-40%. They lost on the majority of trades. They just made sure the winning trades were much, much bigger than the losers.

Why Traders Get This Wrong

Traders chase win rate for a simple reason: winning feels like competence. Seven wins out of ten? That sounds like you know what you're doing. The problem is it says nothing about the size of those wins and losses.

Retail traders almost uniformly make the same mistake. They cut winners early to "lock in profit" and let losers run because they can't stomach realizing a loss. The mechanical result is small average wins and large average losses. You can win 80% of the time and still bleed out slowly.

I've run a systematic BTC strategy live on Bybit for 4+ years. The win rate is 21.9%. Most people who hear that immediately ask how that's possible — it sounds like a strategy that's constantly losing. But the profit factor is what tells the actual story. The strategy has returned +4,909% over 6 years of backtested data because the average winner is substantially larger than the average loser.

The One Thing to Do Differently

If you're evaluating any trading strategy — your own or someone else's — calculate profit factor. Total gross profit ÷ total gross loss. A profit factor above 1.75 is solid. Above 2.0 is good. Above 4.0 might mean the backtest is overfit to historical data, so treat it with some skepticism.

Win rate matters only in combination with your average win/loss size. A 30% win rate with a 3:1 average winner-to-loser ratio has a positive expectancy. A 70% win rate with a 0.3:1 ratio bleeds you slowly. One of those feels much better day-to-day. Only one makes money.