Risk/Reward Ratio & Stop-Loss Placement
How the risk/reward ratio works, why it decides your break-even win rate, and how to place stop-losses that respect it.
The risk/reward ratio compares how much you stand to lose on a trade with how much you stand to gain. A 1:3 ratio means you risk $1 to make $3. It's one of the most important numbers in trading because it sets the win rate you need to be profitable.
Risk/reward and break-even win rate
The higher your reward relative to risk, the fewer trades you need to win to come out ahead. The break-even win rate is 1 / (1 + R), where R is your reward:risk ratio.
- •1:1 → you need to win 50% of trades just to break even.
- •1:2 → break-even at ~33%.
- •1:3 → break-even at 25%.
- •1:5 → break-even at ~17%.
A trader who wins only 40% of the time can still be very profitable at 1:3 risk/reward. Being right less often is fine if winners are bigger than losers.
Placing your stop-loss
Your stop-loss defines the 'risk' side of the ratio, so place it where your trade idea is proven wrong — beyond a support level, a swing low, or a volatility-based distance — not at an arbitrary round number. Then set your take-profit to give you the reward multiple you're targeting.
Tie it together with position sizing
Once your stop distance is set, position sizing decides how many units to buy so that hitting the stop only costs a fixed small percentage of your account. Risk/reward, stop placement and position size work as a system — get all three right and no single trade can hurt you badly.
Frequently asked questions
- What is a good risk/reward ratio?
- Many traders aim for at least 1:2 or 1:3, meaning potential reward is two to three times the risk. Higher ratios lower the win rate you need to be profitable.
- Where should I place my stop-loss?
- At the price that proves your trade idea wrong — beyond a support/resistance level, swing point, or a volatility-based distance — rather than an arbitrary amount. That makes the risk side of your ratio meaningful.
- Can a low win rate still be profitable?
- Yes. With a 1:3 risk/reward, you only need to win about 25% of trades to break even, so a strategy that wins 40% can be very profitable if it sticks to that ratio.