What Is the Risk-Reward Ratio?
The risk-reward ratio compares how much a trade risks with how much it aims to make. How to calculate it, the win rate each ratio needs to break even, and its limits.
The risk-reward ratio compares the amount a trade could lose, the distance to its stop loss, with the amount it aims to make, the distance to its take profit. A trade that risks 40 pips to make 80 has a risk-reward ratio of 1:2.
How to calculate it
Risk-reward = (entry − stop) : (target − entry)
| Signal | Risk | Reward | Ratio |
|---|---|---|---|
| Buy GBP/USD 1.2650, SL 1.2610, TP 1.2730 | 40 pips | 80 pips | 1:2 |
| Buy EUR/USD 1.0850, SL 1.0820, TP 1.0910 | 30 pips | 60 pips | 1:2 |
| Buy EUR/USD 1.0850, SL 1.0790, TP 1.0880 | 60 pips | 30 pips | 2:1 (risking more than the target) |
Conventions vary. Some people write the reward first, and signal groups often advertise “1:3 setups” without saying which way round they mean. The safest habit is to state both numbers in pips or dollars, so there is no doubt about which side of the trade is larger.
The win rate each ratio needs
A ratio on its own says nothing about whether a strategy makes money. It sets the breakeven win rate, the share of trades that must win just to break even before costs:
| Reward relative to risk | Breakeven win rate |
|---|---|
| 0.5 (risk 2 to make 1) | 66.7% |
| 1 (risk 1 to make 1) | 50% |
| 2 (risk 1 to make 2) | 33.3% |
| 3 (risk 1 to make 3) | 25% |
The formula is: breakeven win rate = 1 ÷ (1 + reward-to-risk). Costs such as the spread push every one of these figures higher.
A tiny example
A signal service uses a 20-pip stop and a 40-pip target, a 1:2 ratio, and wins 40% of the time. Per trade, on average:
- Wins: 0.40 × 40 pips = 16 pips
- Losses: 0.60 × 20 pips = 12 pips
- Expected result: +4 pips before costs
The same 40% win rate with a 1:1 ratio would lose 4 pips a trade on average. This average result per trade is called expectancy, covered in why win rate is misleading.
What the ratio leaves out
- Probability. A 1:5 ratio looks attractive, but if the target is rarely reached it is worth little. The ratio says what is possible, not what is likely.
- Slippage and gaps. The actual loss can exceed the planned risk if a stop fills worse than its level. See what is slippage.
- Management after entry. Moving stops, partial exits and early closes change the real ratio from the one advertised.
- Position size. A good ratio with an oversized position can still empty an account in a losing streak. See drawdown and risk of ruin.
Related: Why Win Rate Is Misleading · What Is a Take Profit? · What Is Drawdown?
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