Expectancy is the average amount you can expect to win (or lose) per trade over a large sample size. It’s arguably the most important metric in trading because it tells you whether your system will make money long-term—and exactly how much per trade.
How to Calculate Expectancy
The expectancy formula is:
Expectancy = (Win Rate × Average Win) - (Loss Rate × Average Loss)
Where:
- Win Rate = Number of wins / Total trades
- Loss Rate = 1 - Win Rate
- Average Win = Total profits from winners / Number of winners
- Average Loss = Total losses from losers / Number of losers
Basic Calculation Example
Your trading stats:
- Win Rate: 45%
- Average Win: $200
- Average Loss: $100
Expectancy = (0.45 × $200) - (0.55 × $100) Expectancy = $90 - $55 = $35 per trade
This means over many trades, you can expect to make $35 on average each time you trade.
Expectancy in R-Multiples
Professional traders often express expectancy in R-multiples (risk units) rather than dollars:
Expectancy (R) = (Win Rate × Avg Win in R) - (Loss Rate × 1R)
If you always risk 1R and average 2R on winners with 45% win rate:
Expectancy = (0.45 × 2R) - (0.55 × 1R) = 0.9R - 0.55R = 0.35R per trade
This means you make 0.35 times your risk on every trade, on average.
Why Expectancy Matters
Expectancy connects directly to your bottom line:
Expected Profit = Expectancy × Number of Trades
| Monthly Trades | Expectancy | Expected Profit |
|---|---|---|
| 20 | $35 | $700 |
| 50 | $35 | $1,750 |
| 100 | $35 | $3,500 |
A trader making 50 trades per month with $35 expectancy should make approximately $1,750 before costs.
Expectancy Examples by Trading Style
| Style | Win Rate | Avg Win | Avg Loss | Expectancy |
|---|---|---|---|---|
| Scalping | 65% | $50 | $40 | $18.50/trade |
| Day Trading | 50% | $150 | $100 | $25/trade |
| Swing Trading | 40% | $500 | $200 | $80/trade |
| Position Trading | 35% | $1,500 | $500 | $200/trade |
Notice: Lower win rates can still have higher expectancy if the average win is proportionally larger.
Common Expectancy Mistakes
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Calculating too early – Expectancy from 10-20 trades is unreliable. You need at least 30-50 trades for a meaningful number, ideally 100+.
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Ignoring commissions – A $20 expectancy with $15 in commissions per trade leaves only $5 actual profit. Always calculate net expectancy.
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Assuming consistency – Expectancy can vary by market condition. Bull market expectancy may differ from sideways or bearish periods.
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Confusing expectancy with certainty – Positive expectancy doesn’t mean every trade wins. It means you profit over many trades. Short-term results can vary wildly.
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Not segmenting data – Your overall expectancy might hide that one setup has +$50 expectancy while another has -$20. Track by setup/strategy.
Improving Your Expectancy
You can improve expectancy by:
- Increasing win rate (better entry timing)
- Increasing average win (letting winners run, better targets)
- Decreasing average loss (tighter stop losses, quicker exits)
Even small improvements compound over hundreds of trades.
How JournalPlus Tracks Expectancy
JournalPlus calculates your expectancy automatically and breaks it down by:
- Time period (daily, weekly, monthly)
- Setup type (your custom categories)
- Instrument (stocks, options, futures)
- Market condition
This helps you identify which setups have the highest expectancy and focus your trading on what actually works for you.
