How to Use the Trading Expectancy Calculator
- Enter Win Rate: Enter the winning percentage of your strategy from backtesting or live trading. For example, if you won 55 out of 100 trades, enter 55.
- Enter Average Win: Enter the average amount you earn on profitable trades.
- Enter Average Loss: Enter the average amount you lose on losing trades.
- View Results: The tool will automatically calculate your trading expectancy and profit factor.
Why is Trading Expectancy Critical?
Many novice traders focus only on win rate, but that's where the trap lies. You can have a 90% win rate, but if your single loss is huge, you can still blow up your account. Conversely, many successful trend-following strategies have win rates of only 30-40%, but because of their extremely high reward-to-risk ratio, they have a high positive expectancy.
The expectancy formula (Win Rate × Average Win) - (Loss Rate × Average Loss) combines these two key metrics to give you a single measure of your strategy's true profitability. It's the holy grail for evaluating any trading system.
Frequently Asked Questions (FAQ)
What is a good expectancy value?
Any positive number (> 0) means your strategy has a mathematical edge and is profitable in the long run. The larger the value, the stronger the system's profitability.
What is a good profit factor?
Generally, a profit factor greater than 1.5 is considered good, and greater than 2.0 is excellent. If it's less than 1.0, your strategy is losing money.