Enter entry, stop, target and size. Get the R:R ratio, dollar risk and target price — the risk-reward ratio formula, with the dollars attached.
You risk $200.00 to make $600.00 (1:3). That is 2.00% of the account. A win rate of 25.0% breaks even at this ratio, ignoring costs.
Mantis stores entry, stop and target on every trade and shows planned versus realised risk-reward — no spreadsheet maths after the close.
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Risk is the distance from entry to stop. Reward is the distance from entry to target. On a $50 long with a $48 stop and a $56 target, risk is $2 and reward is $6. Stop and target must sit on opposite sides of entry — otherwise the three prices do not describe a trade.
Reward ÷ risk = 6 ÷ 2 = 3, written 1:3. Some desks invert it and quote risk ÷ reward (0.33). Both describe the same setup. The useful part is fixing the three prices before you enter, so the ratio is a plan rather than a story you tell after the fill.
Multiply each distance by size. 100 shares at a $2 stop is $200 dollar risk. The same size at a $6 target is $600 of planned reward. That is the number that should match the risk % you chose on the position size calculator.
Account $10,000, 100 shares, long $50 / stop $48 / target $56. Dollar risk $200 (2% of the account). Ratio 1:3. Break-even win rate, ignoring costs, is 25%. Change any input above and the output updates — the default numbers stay visible if JavaScript is off.
Entry, stop and target belong in the plan, not in the recap. In Mantis those three fields sit on the trade. Planned R:R is computed from them; realised R:R is computed from the exit. If you only store P/L, you cannot tell a 1:3 plan that you cut at 0.4R from a 1:1 plan that paid in full.
A week of 1:3 stickers on the chart and 0.6R average winners is a management problem, not a setup problem. Track both numbers. The how-to spoke walks through the Mantis fields: how to track risk-reward in a trading journal.
Divide the distance from entry to your profit target by the distance from entry to your stop. Buy at $50, stop at $48, target at $56: reward is $6 and risk is $2, so 6 ÷ 2 = 3, written 1:3. Multiply each distance by position size to get dollar risk and dollar reward.
Dollar risk is the per-unit stop distance times the number of shares, contracts or coins. On a $50 entry with a $48 stop, you risk $2 per share. 100 shares means $200 of dollar risk — the amount you lose if the stop fills.
Take the stop distance and multiply it by the reward multiple, then add it (long) or subtract it (short) from entry. A $50 long with a $2 stop and a 1:3 plan targets $56. This calculator takes the three prices and reports the ratio and the target you typed.
The break-even win rate, ignoring costs, is 1 ÷ (1 + reward/risk). At 1:3 that is 25%. Win one of every four trades at that ratio and you are even; anything above that is expectancy. Real accounts still pay spread and slippage, so treat 25% as a floor, not a goal.
Yes. It runs in your browser, needs no sign-up, and does not send the numbers you type to a server. Mantis, our iOS trading journal, stores entry, stop and target on every fill and computes planned versus realised risk-reward automatically.
Important: Mantis is a trading journal and analytics tool. This calculator is for educational purposes and is not investment advice, not financial advice, and not a recommendation to buy or sell any security or instrument. Trading involves risk; past performance does not guarantee future results. Consult a qualified professional before making financial decisions.