kbwenLab

Risk / Reward Calculator

Turn entry, stop, and target into a reward-to-risk ratio and the win rate you need to break even.

Inputs

Enter three prices for live risk/reward calculation.

Local — no data sent

Direction

Result

Awaiting inputs
-- : 1
Reward : Risk

Enter three prices to see the read.

Breakeven win rate

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Per-trade expectancy

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Enter a win rate to see expectancy

What the calculator assumes

This calculator takes three prices — entry, stop, and target — and computes risk (|entry − stop|) and reward (|target − entry|). The reward-to-risk ratio R = reward ÷ risk. Breakeven win rate = 1 ÷ (1 + R), the minimum win rate that makes expectancy zero.

The optional win rate field computes per-trade expectancy E = win rate × R − loss rate. Positive E means a positive expected value over many trades; negative E means this setup loses money at scale. A high ratio alone is not enough — expectancy needs your win rate too.

限制：這個工具不預測價格、不估算勝率，也不計入手續費、滑點或部分成交。它只是一個根據你提供的假設進行計算的本地工具；所有運算都在瀏覽器中執行，不會傳送任何資料。

Quick guide

Use cases, answers, and nearby tools

Compact below-tool notes that help first-run users and repeated visitors move faster without changing the main interface.

Chinese search: 風險報酬比 計算機、風報比 計算、盈虧比 計算機、損益兩平勝率、停損停利 計算

How to use

Run a clean first pass

  1. Pick direction (long or short), then enter entry, stop-loss, and target prices.
  2. Read the reward-to-risk ratio and breakeven win rate to decide whether the setup clears your minimum threshold.
  3. Add a win rate to see per-trade expectancy and confirm whether the setup has a positive edge.
  4. Hit Copy result to paste a one-line summary into your notes or share with a teammate.

Examples

Real jobs this page helps with

  • Pre-trade sanity checkSize up a 3:1 swing long (entry 100, stop 90, target 130) and instantly see 25% breakeven — well within a 40% win-rate strategy.
  • Why a 5:1 ratio can still loseEnter a 5:1 setup with a 10% win rate to see expectancy come out negative — ratio alone doesn't determine edge.
  • Expectancy sanity-check on a repeat setupA futures trader with a 40% win rate enters their usual setup and checks whether expectancy is positive before placing the order.

FAQ

What people usually want to know

What is a good risk/reward ratio?

Many discretionary traders look for at least 2:1 (reward twice the risk), but no single ratio is universally good — a ratio only pays off if your win rate beats the breakeven rate it implies. This tool shows both so you can judge them together.

How is the breakeven win rate calculated?

Breakeven win rate = 1 / (1 + R), where R is the reward-to-risk ratio. A 3:1 setup breaks even at 25%; a 1:1 setup needs 50%. Below that win rate the setup is negative expectancy over many trades.

Does it work for short trades?

Yes. Toggle to Short and the tool expects your stop above entry and your target below entry; risk and reward are measured as absolute price distances either way.

Does this need live market data?

No. Everything is computed locally in your browser from the prices and win rate you type. Nothing is sent anywhere and no broker connection is needed.

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