Risk-Reward Ratio
How to calculate and evaluate whether a trade's potential payoff justifies the risk.
The risk-reward ratio compares the maximum potential loss on a trade to the maximum potential gain. A 1:2 risk-reward ratio means you are risking $1 to make $2. A 1:3 ratio means risking $1 to make $3. For options traders, this ratio is one of the most fundamental tools for evaluating whether a trade is worth taking. A favorable risk-reward ratio means you do not need to be right on every trade to be profitable over time.
Why It Matters
Risk-reward is the math that keeps you in the game. A trader with a 1:2 risk-reward ratio only needs to be right 34% of the time to break even. A trader with a 1:3 ratio only needs to be right 25% of the time. Conversely, a trader risking $3 to make $1 (a 3:1 ratio) needs to be right 75% of the time just to break even. Many premium-selling strategies have this unfavorable ratio by design — they win often but lose big when they lose.
Understanding risk-reward helps you select strategies, size positions, and set expectations. It forces you to ask before every trade: "Is the potential profit worth the potential loss?" If the answer is no, you skip the trade — no matter how confident you feel about the direction.
How It Works
Calculating risk-reward for common options strategies:
Long call or put (debit):
- Risk: The premium paid
- Reward: Theoretically unlimited for calls, substantial for puts
- Example: Buy a call for $3.00, target $9.00. Risk: $300. Reward: $600. Ratio: 1:2.
Vertical spread (debit):
- Risk: Net premium paid
- Reward: Width of strikes minus premium paid
- Example: Buy a $100/$105 call spread for $2.00. Risk: $200. Reward: $300 ($5 width - $2 cost = $3 max profit). Ratio: 1:1.5.
Credit spread:
- Risk: Width of strikes minus credit received
- Reward: Net premium received
- Example: Sell a $95/$90 put spread for $1.50 credit. Reward: $150. Risk: $350 ($5 width - $1.50 credit = $3.50 max loss). Ratio: 2.3:1 (risk is 2.3x the reward). You need a high win rate.
Iron condor:
- Risk: Width of wider leg minus total credit
- Reward: Total credit received
- Typical ratio: 2:1 to 4:1 (risk to reward). Win rate must be high to compensate.
Key principles:
- Risk-reward alone is not enough. A 1:10 risk-reward ratio sounds amazing, but if the probability of the trade working is only 5%, the expected value is negative. Always consider probability alongside ratio.
- Expected value = (Win rate x Average win) - (Loss rate x Average loss). This is the true measure of a strategy's merit.
- Premium buyers: Typically have favorable risk-reward (1:2 or better) but lower win rates (30-40%).
- Premium sellers: Typically have unfavorable risk-reward (2:1 risk or worse) but higher win rates (60-80%).
- Neither approach is inherently better. Both can be profitable with proper position sizing and discipline.
Setting targets based on risk-reward:
- Before entering any trade, define your profit target and stop-loss.
- Do not accept a trade where the risk-reward is worse than 3:1 without a very high probability of success.
- When in doubt, aim for at least 1:1 — risking $1 to make $1 with a 55%+ win rate is a solid long-term edge.
Quick Example
You are considering two trades. Trade A: Buy a call for $2.00 with a target of $4.00 and a stop at $1.00. Risk: $100, Reward: $200, Ratio: 1:2. You need to be right 33% of the time. Trade B: Sell a put spread for $0.80 credit with max loss of $4.20. Risk: $420, Reward: $80, Ratio: 5.25:1. You need to be right 84% of the time. Both trades can be profitable, but they require completely different win rates. Knowing this before entry shapes your expectations and position size.