George Paul S459 Rivera#69

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What is expectancy in trading systems?

Expectancy measures the average profit or loss a trading system is expected to generate per trade. It is calculated using win rate, average win, and average loss. For example, if a system has a 50% win rate, an average win of $200, and an average loss of $100, the expectancy is +$50 per trade. Positive expectancy means the system is statistically profitable over time, even with losing trades. Traders use expectancy to evaluate system robustness and long-term potential. It is a key metric for systematic and algorithmic strategies.