What Is the Risk/Reward Ratio? How to Calculate and Use It

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The risk/reward ratio compares how much a trade can lose with how much it can gain: the distance from entry to stop-loss is the risk, and the distance from entry to profit target is the reward. A trade that risks $100 to make $300 has a risk/reward ratio of 1:3. Traders use it before entering a position to judge whether the payoff justifies the loss and to work out the win rate a strategy needs to break even.

How the Risk/Reward Ratio Works

Every planned trade has three prices: the entry, the stop-loss (where you exit if you are wrong) and the target or take-profit (where you exit if you are right). The risk/reward ratio is built from the two distances between them.

For a long position:

• Risk = entry price − stop-loss price
• Reward = target price − entry price

For a short position the signs flip: risk is the stop minus the entry, and reward is the entry minus the target.

The ratio can be expressed in price units, pips, ticks or currency, as long as both sides use the same unit. Position size cancels out: a 1:2 trade is 1:2 whether you trade one share or ten thousand. Size only changes how many dollars each unit of risk represents, a separate decision covered below.

The ratio exists only if there is a defined exit on the losing side, so a stop-loss order or a predetermined exit level is the starting point for the calculation.

Calculating the risk/reward ratio

The formula is:

Risk/Reward Ratio = Potential Loss ÷ Potential Gain

Many forex and futures traders use the inverse, reward-to-risk:

Reward-to-Risk = Potential Gain ÷ Potential Loss

A trade risking 40 pips to make 100 pips has a risk/reward ratio of 40 ÷ 100 = 0.4, usually written 1:2.5. Its reward-to-risk is 100 ÷ 40 = 2.5, written 2.5R or 2.5:1.

Notation: 1:3, 3:1 and “R”

Strictly, risk/reward puts risk first, so 1:3 means risking 1 to make 3, and a lower number is more favorable. Platforms, journals and chat rooms often write reward first, so “3:1” or “RR 3” can describe the same trade. Confirm which side comes first before comparing figures.

The letter R is one unit of initial risk. If you risk $200, then 1R = $200, a $600 profit is +3R and a full stop-out is −1R. “A 5 RR trade” has a target five times the stop distance; a reward-to-risk of 3.6 puts the target 3.6 times as far away as the stop, and 1:0.96 means the reward is slightly smaller than the risk. “RR” and “RRR” mean the same thing; neither is a formal standard.

Interpreting the Ratio: The Breakeven Win Rate

The ratio alone does not make a trade good or bad. Combined with win rate, it determines whether a strategy makes or loses money over many trades.

With reward-to-risk expressed as R, the win rate needed to break even (ignoring costs) is:

Breakeven win rate = 1 ÷ (1 + R)

A trader taking 1:1 trades must be right more than half the time. At 1:3, a trader can lose three trades in four and still break even before costs. A win rate below 50% does not by itself mean a losing strategy, and one above 50% does not guarantee a winning one.

The more complete measure is expectancy, the average result per trade in R:

Expectancy = (Win rate × R) − (Loss rate × 1)

Hypothetical example: a strategy wins 40% of trades with an average reward-to-risk of 2. Expectancy = (0.40 × 2) − (0.60 × 1) = 0.80 − 0.60 = +0.2R per trade. Over 100 trades risking $100 each, that averages $2,000 before costs. The same 40% win rate at 1:1 gives (0.40 × 1) − (0.60 × 1) = −0.2R, a losing system.

Is there an ideal ratio?

A 1:3 ratio is a common benchmark, and discretionary traders often treat 1:2 as a minimum. These are conventions, not rules. A scalping strategy can profit at 1:1 or below with a high enough win rate; a trend-following strategy that loses most trades may need 1:4 or more. The right ratio is the one that gives positive expectancy after costs at the strategy’s actual win rate, usually established through backtesting or a trading journal.

Example of the Risk/Reward Ratio

Hypothetical forex trade. A trader buys EUR/USD at 1.1000, places a stop at 1.0950 and a target at 1.1150.

• Risk: 1.1000 − 1.0950 = 50 pips
• Reward: 1.1150 − 1.1000 = 150 pips
• Risk/reward: 50 : 150 = 1:3 (reward-to-risk 3R)

On one standard lot (100,000 units), a EUR/USD pip is worth $10 for a USD-denominated account, so the trade risks $500 to make $1,500; on a mini lot (10,000 units), the amounts are $50 and $150. The ratio stays 1:3; lot size only changes what 1R is in dollars. A position size calculator works the other way: you choose how much of your account to risk, and it returns the lot size that makes the stop distance equal that amount.

Hypothetical stock trade. An investor buys 100 shares at $20 with a stop at $15 and a target of $30. Risk is $5 per share ($500 total), reward is $10 per share ($1,000 total), so the ratio is 1:2.

Changing the stop changes the odds

Suppose the stock trader moves the stop from $15 to $18 and keeps the $30 target. Risk falls to $2 per share and the ratio improves to 1:5, but nothing about the stock has changed. A $2 drop is far more likely than a $5 drop, so the stop is more likely to be hit before the target. Place stops where the trade idea is invalidated, not wherever the ratio looks attractive.

How the Ratio Changes After Entry

The ratio is calculated at entry, but it does not stay fixed. Take the EUR/USD trade above and assume price rises to 1.1100 with the stop still at 1.0950. From the current price, the trader now has 50 pips left to gain and 150 pips of open profit to give back if the stop is hit. Measured from here, the remaining trade is 3:1 against the trader.

This is why traders often trail stops or take partial profits, though tighter stops also cut off some trades that would have reached the target. The original ratio describes the plan at entry, not the position held later.

Limitations of the Risk/Reward Ratio

It ignores probability. A 1:10 trade may almost never reach its target. An unusually favorable ratio often means the target is far away relative to normal price movement or the stop sits inside ordinary noise.

Planned risk is not guaranteed risk. A stop-loss is a trigger price, not a guaranteed fill price. In fast markets, around news releases or when the forex market reopens after a weekend gap, a stop can fill worse than its level, so the loss exceeds 1R. In leveraged accounts, a margin call or stop-out can close positions independently of your plan.

Costs shift the numbers. Spreads, commissions and swap charges reduce reward and enlarge risk; a per-side commission doubles on a round trip. Hypothetically, a 1-pip spread on the 50/150-pip trade above makes the effective risk about 51 pips and the effective reward about 149 pips. The effect is small on wide targets but large on scalping trades with targets of a few pips.

Estimates are not facts. For longer-term investments, both potential loss and gain are estimates drawn from technical levels, historical volatility, fundamental valuation or models such as value-at-risk, and actual outcomes can differ widely.

It does not replace position sizing. A 1:3 trade that risks half the account is still reckless. The ratio sets the shape of a trade; the percentage of capital risked per trade determines how much damage a run of losses does.

What the Risk/Reward Ratio Is Not

• Not win rate. Win rate is how often trades succeed; the ratio is how large wins are relative to losses. You need both to judge a strategy.
• Not the risk-return tradeoff. The broader investing principle that higher expected returns come with higher volatility describes asset classes and portfolios, not a single trade’s stop and target.
• Not a risk-adjusted performance ratio. Measures such as the Sharpe ratio evaluate realized returns against volatility after the fact. The risk/reward ratio is a forward-looking plan for one trade.
• Not a way to recover losses. Increasing size after losses, as in the martingale strategy, changes how much each R is worth and can turn a sound ratio into a large drawdown.

FAQs

The Bottom Line

Forex, futures and stock traders who set stops and targets before entering can use the ratio to check whether a trade's payoff justifies its loss. The ratio only matters alongside win rate, costs and position size, so the useful goal is positive expectancy at the strategy's real win rate. Place stops where the trade idea fails, then judge the ratio that results.