What is trading expectancy?

Trading expectancy is the average dollar amount or R-multiple you can expect to win or lose per dollar risked over a large series of trades. A positive expectancy means your strategy is statistically profitable.

Can you be profitable with a 40% win rate?

Yes. With a 40% win rate and an average reward-to-risk ratio of 2.5 to 1, your expectancy is +0.40R per trade. Across 100 trades risking $500, that generates an expected profit of $20,000 despite losing 60% of all trades.

Statistical Edge & Strategy Expectancy

Trading Expectancy Calculator

Calculate your statistical edge per trade. If your expectancy is negative, no amount of discipline will make you profitable.

Currency:

Presets:

Historical Win Rate (%)50%

Average Winning Trade ($)$600

Average Losing Trade ($)$300

Calculated Strategy Edge

Expectancy Per TradeExpected value per execution

+$150.00

R-Multiple Edge+0.500R per trade

Payoff Ratio (Win / Loss)2.00 : 1

Profit Factor2.00

100 Trades Expected P&L+$15,000

Statistical Max Losing Streak~ 7 consecutive losses

Want to measure expectancy per setup across your entire trading history?

Learn how Playbooks calculate setup expectancy

The Mathematical Formula for Trading Expectancy

Expectancy represents your mathematical edge in the market. Without positive expectancy, a trader is engaging in negative-sum gambling after commissions, slippage, and execution friction.

Expectancy = (Win Probability × Average Win) - (Loss Probability × Average Loss)

The Win Rate Illusion: 40% Win Rate vs 75% Win Rate

Strategy Profile	Win Rate	Payoff Ratio	Expectancy per 100 Trades ($500 risk)
Trend Follower / Breakout	40%	2.5 : 1 ($1,250 avg win)	+$20,000 profit
Scalper with Bad Risk Management	75%	0.25 : 1 ($125 avg win)	-$3,125 loss

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