What Is Trading Expectancy? Formula and Example | TradesMatrix

TradesMatrix Guide

What Is Trading Expectancy?

Trading expectancy estimates the average historical outcome per trade from a defined sample. It depends on both the frequency of wins and losses and their average sizes.

Formula

Expectancy = (Win Rate × Average Win) − (Loss Rate × Average Loss)

Use win and loss rates as decimals, and calculate average loss as a positive amount. Use a consistent net or gross convention across all inputs.

Example

At a 55% win rate, a ₹200 average win, and a ₹150 average loss: (0.55 × ₹200) − (0.45 × ₹150) = ₹42.50 per trade for that sample, before any omitted costs.

Limits

  • Historical expectancy can change as market conditions and execution change.
  • Include fees and slippage consistently.
  • A positive estimate is not a forecast or a guarantee of future results.

Educational information only, not investment or financial advice. Calculator outputs depend on the inputs and assumptions used; they do not predict results or remove trading risk.