What risk/reward ratio do I need to break even at my win rate?

How this is calculated

• This is the mathematical inverse of asking what win rate a strategy needs for a given risk/reward. Here you start from your actual win rate and solve for the reward multiple needed to avoid losing money over time.
• Formula used: required R equals one minus your win rate as a decimal, plus any added cost fraction, divided by your win rate as a decimal.
• The optional cost input treats commissions and slippage as a percentage of your risk amount per trade, and raises the required ratio accordingly.
• This is a breakeven threshold, not a profit target. An actual edge means beating this number consistently, not just meeting it.