Trading Expectancy Calculator
Calculate your expected profit per trade. Enter your win rate and average win/loss to find out if your trading system has a real edge.
Track This Automatically with Disciplined
Stop calculating manually. Disciplined computes your expectancy in real-time across all your trades — by asset, by setup, by time period.
- Real-time metric tracking
- Unlimited trade logging
- Professional analytics dashboard
- Free up to 50 trades
Understanding Trading Expectancy
The Expectancy Formula
Trading expectancy is the single most important metric for evaluating a trading system. It tells you the average amount you can expect to win (or lose) per trade over a large sample of trades.
Expectancy = (Win% × Avg Win) − (Loss% × Avg Loss)
The R-multiple version normalizes expectancy by your risk unit, making it easier to compare across different position sizes and account sizes:
Expectancy (R) = (Win% × Avg Win/Avg Loss) − Loss%
Why Win Rate Alone Is Misleading
Many traders focus exclusively on win rate, but this is only half the equation. A 70% win rate means nothing if your average loss is 3x your average win. Conversely, many successful trend-following systems have win rates below 40% — they make money because their winners dwarf their losers.
Expectancy captures both dimensions: how often you win and how much you win relative to your losses. It is the true measure of your trading edge.
How to Improve Your Expectancy
There are only three levers to improve expectancy:
- Increase your win rate — better trade selection, tighter entry criteria, confirmation signals
- Increase average win size — let winners run, scale into profitable positions, use trailing stops
- Decrease average loss size — cut losers quickly, use tighter stop losses, avoid moving stops against you
A trading journal helps you identify which lever has the most potential. By analyzing your trade data, you can find specific patterns — certain setups, times, or assets where your expectancy is highest — and focus your trading there.
Frequently Asked Questions
What is trading expectancy?▾
Trading expectancy measures how much you can expect to make (or lose) per trade on average. It combines your win rate with your average win and loss sizes. A positive expectancy means your system makes money over time; a negative expectancy means it loses money.
How is trading expectancy calculated?▾
Expectancy = (Win Rate × Average Win) − (Loss Rate × Average Loss). For example, with a 55% win rate, $200 average win, and $150 average loss, your expectancy is (0.55 × $200) − (0.45 × $150) = $110 − $67.50 = $42.50 per trade.
What is a good expectancy value?▾
Any positive expectancy indicates an edge. However, the significance depends on your trade frequency and costs. An expectancy above $0.50 per trade (after commissions) is generally considered solid. In R-multiple terms, an expectancy above 0.2R is good, and above 0.5R is excellent.
Can I have a low win rate and still be profitable?▾
Absolutely. If your average win is significantly larger than your average loss, you can be profitable with a win rate well below 50%. For example, trend followers often win only 30-40% of the time but their winners are much larger than their losers, resulting in positive expectancy.
How many trades do I need for a reliable expectancy calculation?▾
At minimum 30 trades, but ideally 100+ trades give you statistical significance. With fewer trades, your expectancy estimate has a wide margin of error. Disciplined automatically calculates expectancy as you log trades, so it becomes more accurate over time.