Profit Factor Explained: Formula, What Is a Good Value, and Why It Can Mislead You

Profit factor is gross profit divided by gross loss. This guide shows the formula, a worked example, its relationship with win rate and payoff, realistic benchmarks, and the situations where profit factor hides drawdown, outliers and small samples.

In this guide

1. 1. What Profit Factor Is
2. 2. A Worked Example, Trade by Trade
3. 3. How Profit Factor Connects to Win Rate and Payoff
4. 4. Gross vs Net: What Costs Do to Profit Factor
5. 5. What Is a Good Profit Factor?
6. 6. Five Ways Profit Factor Misleads
7. 7. Profit Factor vs Expectancy, Recovery Factor and Sharpe
8. 8. How to Calculate It in a Spreadsheet
9. 9. Track a Rolling Profit Factor Instead of One Number
10. 10. How to Improve Profit Factor Without Fooling Yourself
11. 11. Frequently Asked Questions

FAQ

What is profit factor in trading?

Profit factor is the sum of all winning trades divided by the sum of all losing trades (as a positive number). A value above 1.0 means the strategy earned more than it lost; below 1.0 means it lost money overall.

What is a good profit factor?

As a rule of thumb, values between roughly 1.3 and 2.0 are often considered workable for a realistic strategy, provided the sample is large and the drawdown is acceptable. Values far above 3.0 in a backtest deserve suspicion of look-ahead bias, overfitting or too few trades.

How do I calculate profit factor?

Add up all profits to get gross profit, add up all losses as a positive number to get gross loss, then divide gross profit by gross loss. Use results after costs for a realistic figure.

Is profit factor better than win rate?

They answer different questions. Win rate shows how often you win, while profit factor combines frequency with size. A 70% win rate can still produce a profit factor near or below 1.0 if winners are small.

Can a strategy with a high profit factor still be bad?

Yes. If it has few trades, relies on one outlier, has a deep drawdown, or depends on very low costs, a high profit factor can be misleading. Read it together with trade count, drawdown and expectancy.