リスクリワード計算ツール

リスクリワードレシオを計算

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この計算ツールの使い方

The Risk/Reward Calculator helps you evaluate the potential profitability of a trade before you enter it. Enter your entry price, your planned stop-loss price, and your target take-profit price. The calculator will determine your risk-to-reward ratio and tell you the minimum win rate required to break even.

計算式

Risk Per Share = |Entry Price - Stop Loss Price|

Reward Per Share = |Take Profit Price - Entry Price|

Risk:Reward Ratio = 1 : (Reward Per Share / Risk Per Share)

例

If you buy a stock at $50, set a stop loss at $48, and a take profit at $56:

  • Your risk is $2 per share.
  • Your reward is $6 per share.
  • Your Risk:Reward Ratio is 1:3 ($6 / $2).

よくある質問

Many professional traders aim for a risk-reward ratio of at least 1:2 or 1:3. This means that for every dollar they risk losing, they aim to make two or three dollars in profit.
Win rate is the percentage of your trades that are profitable. A high win rate is good, but even a low win rate can be profitable if your risk-reward ratio is high enough.
They are inversely related. If you have a high risk-reward ratio (e.g., 1:3), you can be profitable even with a lower win rate (e.g., 30%). If your ratio is low (e.g., 1:1), you need a higher win rate (over 50%) to be profitable.
The break-even win rate is the minimum percentage of trades you need to win, at a given risk-reward ratio, to neither make nor lose money.
No, your stop loss should be placed based on technical analysis or market structure, not arbitrarily tightened just to improve your mathematical ratio.

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