Win Rate
Definition
Win rate is the percentage of your trades that result in a profit — calculated as (number of winning trades ÷ total trades) × 100 — and while commonly cited as a measure of trading success, it means very little without also knowing the average size of wins versus losses.
Example
“I have a 45% win rate, which sounds bad until you see my average winner is $320 and my average loser is $140. That's a profit factor of 2.2. I win less than half the time and I'm consistently profitable. Win rate alone is meaningless.”
Detailed Explanation
Win rate is one of the most misunderstood statistics in trading. Beginners instinctively optimize for winning more trades — it feels better to be right, and a 70% win rate sounds impressive. But the math of trading doesn't care about your accuracy; it cares about the product of win rate and average win size minus the product of loss rate and average loss size. A 70% win rate with average wins of $80 and average losses of $300 is an expectancy of (0.70 × $80) − (0.30 × $300) = $56 − $90 = -$34 per trade. A losing system despite winning nearly three-quarters of trades.
Different trading styles naturally produce different win rates, and there's no universally correct number. Scalpers who target small, frequent gains often have win rates of 60–75% because they're taking many small, high-probability trades and cutting losses quickly. Trend followers who let winners run while taking many small probing losses often have win rates of 35–45%, but their average winner dwarfs their average loser. Both can be highly profitable with the right combination of win rate and risk-reward. The essential question is whether your specific combination of win rate and average win/loss produces positive expectancy, not whether your win rate is high or low in absolute terms.
Tracking win rate is still valuable as a diagnostic metric, just not in isolation. If your win rate suddenly drops from 50% to 30% over a month, that's a signal worth investigating — are setups failing more often (market regime change), are you taking lower-quality entries (discipline issue), or has your stop placement shifted (risk management drift)? Similarly, if your win rate spikes to 75% but profits are flat, you may be cutting winners too early (paper hands increasing win count at the expense of average win size). Win rate tells you the frequency side of the expectancy equation; always pair it with average win and average loss to complete the picture.