🧰 UtlKit

ATR Stop Loss Calculator

Set dynamic stop-loss based on Average True Range

What is this tool?

The ATR (Average True Range) stop-loss calculator sets dynamic stop-loss levels based on market volatility rather than arbitrary dollar amounts. J. Welles Wilder developed ATR in 1978 as a volatility indicator. By multiplying the ATR value by a factor (typically 1.5-3x), you create a stop-loss that adapts to current market conditions — wider in volatile markets and tighter in calm ones. This prevents premature stop-outs while protecting against genuine reversals.

How to use

  1. 1

    Enter entry price

    Type the price at which you entered your position.

  2. 2

    Set ATR value

    Input the current ATR value (typically 14-period).

  3. 3

    Choose multiplier

    Select your ATR multiplier (1.5x for tight, 2.0x for moderate, 3.0x for wide stops).

  4. 4

    View stop levels

    See your calculated stop-loss price and potential risk per share.

Frequently Asked Questions

What is ATR and why use it for stop-losses?

ATR measures average price movement over a period (typically 14 bars). Using ATR-based stops ensures your stop is set beyond normal market noise. A fixed $5 stop might work in calm markets but gets triggered by normal volatility during earnings or news events. ATR stops adapt automatically.

What ATR multiplier should I use?

The standard is 2.0x for swing trades and 1.5x for day trades. Conservative traders use 2.5-3.0x for position trading. The key is consistency — pick a multiplier and stick with it. Backtest your chosen multiplier against historical data for your specific market to find the optimal setting.

Should I use the same ATR for long and short positions?

The ATR value itself is direction-agnostic and can be used for both. For longs, subtract ATR×multiplier from your entry. For shorts, add it. Some traders use asymmetric multipliers — wider stops for shorts in bull markets where gap-ups are common.

How do I set an ATR stop-loss?

Multiply the ATR by a multiplier (commonly 1.5-3) and place the stop that far from entry: long stop = entry - k × ATR. Example: entry $100, 14-period ATR $2, k = 2, stop at $96. ATR adapts to current volatility, so the stop widens in choppy markets and tightens in quiet ones.

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