Which metrics actually matter when evaluating a strategy?
Win rate, risk-reward, profit factor and max drawdown: the four figures that define a strategy — and why win rate alone is the most misleading of them all.
JUL/5/2026 · 2 min read
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A backtest without the right metrics is just a pile of numbers. Four figures tell you almost everything you need to know about a strategy — and the most famous one, win rate, is the most misleading.
Why does win rate alone mean nothing?
Win rate — the percentage of winning trades — is the metric everyone looks at first and the one most often misread. A strategy that wins 90% of the time can still ruin you if those wins are tiny and the few losses are huge. And one that's right only 40% of the time can be very profitable if, when it wins, it wins big. Win rate is never read alone: it's read alongside how much you make versus how much you lose.
What is the risk-reward ratio and why does it rule?
The risk-reward ratio (R:R) compares what you risk against what you aim to win on each trade. If you risk 1 to make 2, your R:R is 1:2. This is the other half of the win-rate equation, and together they decide whether you have an edge: with a 1:2 R:R you only need to be right a little over 33% of the time to break even. That's why a trader with "bad aim" but good R:R beats one with a great win rate and terrible R:R.
What is profit factor?
Profit factor sums up the two above in a single number: total won divided by total lost. Above 1 you make money; below it, you lose. A profit factor of 1.5 means that for every dollar you lose, you make 1.50. It's the fastest way to compare two strategies at a glance, because it folds hit frequency and trade size into one figure.
Why is max drawdown the one that saves your account?
Max drawdown is the largest peak-to-trough drop in your equity curve — how much you were down at the worst stretch. It matters because it's the survival metric: a strategy that's profitable in the long run is worthless if its worst streak blows up your account before you get there. It tells you how much pain you have to be able to endure, and whether your position size is realistic.
How do you use them together?
No single figure decides on its own. A good strategy usually has a healthy R:R, a profit factor clearly above 1, and a drawdown you can tolerate without abandoning the plan. All of this comes from logging your trades with discipline; without that record, these metrics are impossible to compute. It's the foundation an honest backtest is built on — and the reason a trade journal isn't optional.
