Expectancy Calculator
Plug in your win rate, average winner (in R), and average loser (in R). Returns the expectancy per trade, total expected R and dollars over N trades, the profit factor, and the breakeven win rate at your win/loss ratio. The math that decides whether a 40% win-rate strategy is profitable or a 60% win-rate strategy is bleeding.
Read the lesson: Expectancy and the R-Multiple SystemExpectancy Calculator
Plug in your win rate, average winner, and average loser to see what one trade is worth on average - and what 100 of them compound to.
Other calculators
- Position Size Calculator
How many shares or contracts to buy given your account size, per-trade risk, and stop distance.
- R-Multiple Calculator
Convert any trade outcome into R units. Lets you compare wins and losses across different position sizes on equal footing.
- Kelly Criterion Calculator
The mathematically optimal fraction to risk per trade - and why the answer is always 'less than full Kelly'.
- Drawdown Recovery Calculator
The asymmetry that ends careers: a 50% loss takes a 100% gain to recover. Visualised at any drawdown level.
- Options P/L Calculator
Profit and loss at expiration for a single-leg call or put, with the breakeven price and the most you can make or lose.
- Profit Factor Calculator
Total winnings divided by total losses. One number for whether a strategy makes money, and how much room it has before it stops.
- Risk-Reward Ratio Calculator
Planned reward against planned risk, plus the win rate that ratio needs to break even.