TRADING & RISK
Trailing-Stop Price Calculator
Calculate a percentage trailing-stop level from a favorable extreme.
Your result
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How to use this calculator
Adjust the inputs to your own scenario, then review the result alongside the assumptions below. The $ symbol is a currency label; the tool does not convert exchange rates.
Worked example
A 10% trailing stop below a $120 long-position high is $108.
The formula
Long trail = highest price × (1 − trail %). Short trail = lowest price × (1 + trail %).
What the result means
Compare the output with the stated assumptions. Changing an input changes the arithmetic; it does not establish how a real trade or investment will perform.
Assumptions and limitations
Uses the extreme you enter, not live prices. Does not simulate when the stop triggers or guarantee fills.
Common questions
What does this calculation include?
Uses the extreme you enter, not live prices. Does not simulate when the stop triggers or guarantee fills.
Are the example inputs recommendations?
No. The defaults are worked examples. Enter values appropriate to your own calculation; outputs are estimates rather than forecasts.
Put your trading rules to the test
Explore supported daily stock rules, then review historical trades, drawdowns, and the report’s assumptions.
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Open calculator →Educational calculations, not a forecast or personalized investment advice. Your inputs are used locally for the calculation and are not submitted by this tool.