ATR Stop-Loss Calculator
The ATR stop-loss calculator multiplies Average True Range by a chosen multiplier, then estimates a volatility-adjusted stop price and a target based on your risk-to-reward ratio.
ATR measures volatility, not direction. An ATR-based distance can adapt to changing market conditions, but the stop should still sit beyond a logically defined invalidation point.
ATR Stop-Loss Calculator
A volatility-adjusted stop distance
How to calculate an ATR-based stop
Enter the planned entry, current ATR, ATR multiplier and target risk-to-reward ratio. Select long or short to calculate the corresponding stop and target.
- Read ATR from the same timeframe as the setup.
- Choose a multiplier that has been tested for the market and method.
- Check whether the stop lies beyond structural invalidation.
- Use the stop distance to calculate position size from a fixed monetary risk.
Formula used
Stop distance = ATR × multiplier. Long: Stop = Entry − distance; Target = Entry + distance × R:R. Short uses the inverse signs. The theoretical break-even win rate is 1 / (1 + R:R), before costs.
Worked example
Hypothetical example: Entry = 100, ATR = 2, multiplier = 1.5 and R:R = 2. The stop distance is 3. For a long trade, Stop = 97 and the reference target = 106. The theoretical break-even win rate is 33.33% before costs.
How to interpret the result
If the ATR result puts the stop inside normal price noise or ahead of structural invalidation, do not apply it mechanically. Reassess the entry, multiplier or trade rather than widening risk after entry.
Limitations and common mistakes
- Using ATR from a different timeframe.
- Treating ATR as a directional signal.
- Selecting a multiplier without testing.
- Ignoring spread, commission, slippage and gaps.
Recommended learning resources
- Position sizing formula
- Risk-to-reward ratio explained
- Technical indicators for trading
- Pivot Points calculator
Frequently asked questions
What ATR multiplier should I use?
There is no universal setting. Values such as 1.5 or 2 ATR are testing starting points, not recommendations; validate the multiplier against the market, timeframe and setup.
Does rising ATR mean price will rise?
No. ATR measures the magnitude of movement and does not identify direction.
Risk notice: This calculator is an educational planning aid, not investment advice or a trading signal. Trading can result in loss of capital. Input quality, spreads, slippage and changing volatility can make live results differ from estimates.
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