ATR stop calculator
A stop scaled to how much the instrument actually moves, rather than to a round number - and the position size that stop leaves room for.
What the number means
ATR measures the instrument's average range over recent sessions. A stop set at some multiple of it sits outside ordinary noise by construction: 1.5 × ATR says "this trade is wrong if price moves half again more than a typical day against me".
The discipline this buys is coupling. When volatility doubles, the stop widens and the size halves automatically - the risk in money stays exactly where you set it. Traders who size the same number of lots in calm and wild markets are running two different risk levels and calling them one.
Worked example
ATR is 0.0080 - 80 pips on a four-decimal pair. Multiplier 1.5, a $10,000 account risking 1%.
- Stop distance: 0.0080 × 1.5 = 0.0120, or 120 pips
- Cash at risk: $100
- Size: $100 ÷ 0.0120 = 8,333 units, which is 0.08 lots
The unit test suite pins these exact figures.
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<a href="https://ticksprout.com/tools/atr-stop">ATR stop calculator by Tick Sprout</a>Related tools
- Risk to reward calculator
The ratio of a planned trade and the win rate that ratio needs just to break even.
entry 100, stop 98, target 106 → 3.0 R
- Risk of ruin calculator
The probability a strategy ever loses a chosen share of its account.
45% win, 2.0 payoff, 1% risk → ~0% risk of ruin
- Gap cost calculator
What a gap through your stop actually costs, beyond the loss the stop planned.
EUR/USD 1 lot, 20-pip stop, 60-pip gap → $600 over plan