TRADING & RISK
ATR Stop & Position Size Calculator
Use a manually entered ATR to estimate stop distance and whole-share size.
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 $2 ATR and 2× multiplier give a $4 stop distance; $100 risk permits 25 shares.
The formula
Stop distance = ATR × multiplier. Shares = floor(min(account risk budget ÷ distance, account ÷ entry)).
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
ATR must match your chosen timeframe and units. No live data, fees, gaps, leverage, or guaranteed stop execution. Long stop must remain positive.
Common questions
What does this calculation include?
ATR must match your chosen timeframe and units. No live data, fees, gaps, leverage, or guaranteed stop execution. Long stop must remain positive.
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.