How to Calculate Risk to Reward Ratio in Trading

To calculate risk to reward ratio in trading, divide your potential profit by your potential loss. If you risk $100 to make $300, your risk to reward ratio is 1:3. This simple calculation helps you determine whether a trade offers enough upside to justify the downside risk before you enter a position.

The Basic Risk to Reward Formula

The formula is straightforward: Risk to Reward Ratio = (Target Price - Entry Price) / (Entry Price - Stop Loss Price). For a long trade, your target price is above your entry, and your stop loss is below. For a short trade, the positions reverse. The result tells you how many dollars you stand to gain for every dollar you risk.

Express the ratio in the format 1:X, where X represents the reward units per 1 unit of risk. A ratio of 1:2 means you risk $1 to potentially gain $2. A ratio of 1:0.5 means you risk $1 to gain only $0.50, which most traders would reject as unfavorable.

Step by Step Calculation Example

Suppose you plan to buy a stock at $50. You set your stop loss at $48 and your profit target at $56. Your risk per share is $50 - $48 = $2. Your potential reward per share is $56 - $50 = $6. Divide reward by risk: $6 / $2 = 3. Your risk to reward ratio is 1:3.

If you trade 100 shares, you risk $200 total to potentially gain $600. The ratio remains 1:3 regardless of position size. The calculation scales proportionally, making it useful for comparing trades of different sizes.

Why Risk to Reward Matters

This ratio determines whether your trading approach can be profitable over time. If you maintain a 1:2 ratio, you only need to win 34% of your trades to break even (ignoring commissions). With a 1:3 ratio, you break even at 25% win rate. The better your ratio, the lower your required win rate for profitability.

Many traders set minimum ratio requirements, such as refusing trades below 1:2. This discipline prevents taking trades where a small profit potential does not justify the risk. The ratio acts as a filter before you commit capital.

Common Mistakes When Calculating

The most common error is moving your stop loss after entering a trade, which changes your actual risk without updating your calculation. If you set a stop at $48 but mentally decide you will exit at $46 if hit, your real risk is $4, not $2. Your ratio is now worse than planned.

Another mistake is setting unrealistic targets based on hope rather than chart structure. If the nearest resistance is at $54 but you set your target at $60 for a better ratio, you are fooling yourself. Your reward should reflect realistic price levels based on support, resistance, or technical patterns.

Adjusting Ratios for Different Strategies

Scalpers often accept lower ratios like 1:1 or 1:1.5 because they take many trades and rely on high win rates. Swing traders typically seek 1:2 or higher because they take fewer trades and can afford lower win rates. Position traders might target 1:5 or more, holding through larger price swings.

Your strategy timeframe and win rate should align with your ratio requirements. A high-frequency approach with 60% wins can work with 1:1 ratios. A low-frequency approach with 40% wins needs 1:3 or better to stay profitable.

Tracking Your Ratios Over Time

Recording your planned and actual risk to reward ratios reveals whether you follow your rules. You might plan 1:3 trades but actually close winners early at 1:1.5 while letting losers hit full stops. This behavior destroys your edge even if your initial setups are sound.

Chart Grader's AI-powered trade journaling automatically calculates and tracks your risk to reward ratios across all your trades, comparing what you planned versus what you executed. This data helps you identify patterns like premature exits or stop loss violations that quietly erode profitability, giving you specific feedback to improve your trade management and maintain the discipline your strategy requires.