Win Rate vs. Profit Factor:
Which Number Actually Predicts Profitability?
Win rate tells you how often you're right. Profit factor tells you whether being right is actually making you money. These two numbers can tell completely opposite stories.
Why a high win rate can hide a losing strategy
Imagine you take 10 trades. You win 7 of them for an average of $50 each = $350 gross profit. You lose 3 of them for an average of $200 each = $600 gross loss. Win rate: 70%. Net result: −$250.
This is one of the most common patterns in retail trading data. Traders cut winners too early (taking $50 profits) and let losers run too long (holding through −$200). The win rate looks great. The account is shrinking.
What profit factor actually is
Profit factor = gross profit ÷ gross loss. It's the ratio of total dollars won to total dollars lost, across all trades.
Profit factor above 1.0 means you made more than you lost — you're profitable. Below 1.0 means the opposite. The specific values:
The relationship between win rate and profit factor
These two numbers are linked through your average win/loss ratio. The formula: to be profitable, your win rate must exceed loss_rate ÷ (1 + win_loss_ratio). Simplified: if you win $100 on average when right and lose $100 when wrong, you need a 50%+ win rate. If you win $200 when right and lose $100 when wrong, you only need a 33%+ win rate.
This is why letting winners run and cutting losses short is the foundational rule of trading. It shifts the math in your favor so dramatically that even a 35% win rate becomes profitable.
How to use both metrics together
Win rate tells you about your entry quality. If your win rate is consistently below 30%, your entries are poor — you're picking bad setups or entering too early/late. Profit factor tells you about your trade management. You can have excellent entries and a 55% win rate and still have a profit factor below 1.0 if you hold losers too long.
The diagnostic: