Updated: 2026-02-20
Size a trade using ATR-based stop distance so volatility changes don't break your risk plan. The calculator is free and intentionally simple so you can plan trades quickly without skipping risk logic.
$ tool
Size a trade using ATR-based stop distance so volatility changes don't break your risk plan.
Note
Outputs are only as accurate as your inputs.
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$ atr-position-size
33.333333 units
Enter your inputs before you place the trade, not after. Pre-trade planning is where calculators create value.
Use realistic values based on your actual execution conditions. If you understate slippage, fees, or stop distance, output quality collapses.
Document the result inside your journal so you can compare planned vs realized outcomes during review.
ATR sizing uses volatility as the stop-distance input. When volatility expands, your position size automatically shrinks, keeping risk stable.
Use the ATR multiple that matches how you actually place stops. If you use structure-based stops, treat ATR as a sanity check, not a replacement.
Most preventable losses come from skipping one simple calculation when markets move fast. This tool enforces the minimum math needed for disciplined execution.
The value compounds when used consistently. One correct risk decision rarely changes a year; repeated correct decisions usually do.
Tie calculator output to your strategy tags so you can evaluate whether your planning assumptions match live performance.
Use this tool at planning time, then compare outcome quality in weekly review sessions.
If planned and realized values diverge, investigate execution behavior before adjusting strategy logic.
Pair this with one behavior correction each week for compounding improvement.
Using unrealistic inputs because they feel better emotionally.
Changing parameters mid-trade to justify staying in a bad position.
Treating one output as a signal to trade rather than a risk filter.
Yes. The calculator is free and available without signup.
ATR position sizing uses volatility (ATR) to set an effective stop distance. When ATR expands, the tool reduces your size so the dollar risk stays similar across different volatility regimes.
Start with the way you actually place stops. If your stops typically sit beyond recent structure, choose an ATR multiple that roughly matches that distance, then review a week of trades to see whether you get stopped by noise or survive to target.
Outputs are only as accurate as inputs. Use realistic assumptions and review planned vs realized values weekly.
Yes. You can pair tool outputs with your review workflow and setup tags for better post-trade diagnostics.
See plans and run one weekly review loop with Tiltless: edges, leaks, and enforceable next actions.
