Win Rate and Profit-Loss Ratio, Which Is More Important

People often ask veteran quant traders:

“My strategy has only a 30% win rate, is that too low?”
“Is it better to have a higher win rate or a higher profit-loss ratio?”
Today, let’s explore this question thoroughly.

1. First, understand: What is Win Rate? What is Profit-Loss Ratio?

Indicator Definition Formula
Win Rate The proportion of profitable trades out of total trades Profitable trades ÷ Total trades
Profit-Loss Ratio Average profit per trade ÷ Average loss per trade Average profit ÷ Average loss

For example:

A strategy makes 100 trades, wins 40, loses 60. Average profit per trade is 1,000 yuan, and average loss per trade is 500 yuan.

Win Rate = 40%
Profit-Loss Ratio = 1000 ÷ 500 = 2
Win rate is less than half, but with a ratio of 2, overall it’s still profitable.

2. Which is more important: Win Rate or Profit-Loss Ratio?
Veteran quant traders’ answer: The profit-loss ratio is more important.

Why?

Because the win rate has an upper limit.

Any quantitative trading strategy rarely exceeds a 60% win rate in the long term. Even if it does, it’s often achieved by “taking small profits and running,” which results in a low profit-loss ratio.

But the profit-loss ratio can be very high. Ratios of 3:1, 5:1, or even 10:1 are possible.

3. A simple formula: Expected Value
To judge whether a quantitative trading strategy is good or not, look at the expected value:

Expected Value = Win Rate × Average Profit - (1 - Win Rate) × Average Loss
Expressed in terms of win rate and profit-loss ratio:

Expected Value = Win Rate × Profit-Loss Ratio - (1 - Win Rate)

Win Rate Profit-Loss Ratio Expected Value Result
30% 3 0.30×3 - 0.70 = 0.20 ✅ Profitable
40% 2 0.40×2 - 0.60 = 0.20 ✅ Profitable
50% 1.5 0.50×1.5 - 0.50 = 0.25 ✅ Profitable
60% 1 0.60×1 - 0.40 = 0.20 ✅ Profitable
70% 0.5 0.70×0.5 - 0.30 = 0.05 ⚠ Slightly Profitable

As long as the expected value is greater than zero, the strategy can make money.

Veteran quant traders’ experience: Win rates of 30%-40% and profit-loss ratios of 2-3 are comfortable ranges. No need to chase high win rates, as that often comes at the expense of lower profit-loss ratios.

4. Win Rate and Profit-Loss Ratio for Different Strategy Types

Strategy Type Win Rate Profit-Loss Ratio Characteristics
High-Frequency Market Making 60%-80% Less than 1 Small profits, small losses
Trend Following 30%-40% 2-4 Small losses often, big wins occasionally
Grid/Martingale 70%-90% 0.5-1 High win rate, but large drawdowns possible

When developing trading systems for clients, veteran quant traders set different goals based on strategy type:

Trend strategies: Do not pursue high win rates, but aim for a profit-loss ratio of at least 2.
Range-bound strategies: Win rate can be higher, but profit-loss ratio should not be below 0.8.

5. A Common Misconception
Many people, in pursuit of high win rates, set take-profit targets very close and stop-losses very far.

Result: Win rate increases, but each win only covers half a loss. Overall, not profitable.

Veteran quant traders’ advice:

Set your profit-loss ratio first, then accept the corresponding win rate.
For example, if you want to do a trend-following strategy with a profit-loss ratio of 2, and backtesting shows a win rate of only 30%, that’s okay—the expected value is still positive. Don’t change parameters just to increase win rate, as that often reduces the profit-loss ratio.

6. How to optimize these two indicators?
If you want to optimize win rate and profit-loss ratio in your trading system, veteran quant traders suggest:

Methods to improve profit-loss ratio:

Relax take-profit levels to let profits run
Tighten stop-losses to control individual losses
Use trailing stops to protect floating profits

Methods to improve win rate:

Add filtering conditions to reduce invalid trades
Trade only in specific market conditions
Raise the confirmation threshold for entry signals

Note: Improving one indicator often sacrifices the other.

Finding a balance that suits your strategy is more important than chasing “double high.”

Finally
Win rate and profit-loss ratio are the two wheels of quantitative trading. Remove one, and the system becomes unstable; favor one too much, and it won’t run straight.

Veteran quant traders’ advice: First ensure a good profit-loss ratio, then accept the corresponding win rate. Don’t sacrifice profit-loss ratio just to achieve a higher win rate.

If you’re engaged in quantitative trading or want to build a trading system, feel free to message veteran quant traders.

Mention “Win Rate and Profit-Loss Ratio,” and we can discuss your strategy logic to help analyze whether your current indicators are reasonable.