Maximum Adverse Excursion Calculator
Analyze MAE to optimize stop loss placement based on historical trade data. Enter values for instant results with step-by-step formulas.
Formula
Optimal Stop = Mean MAE + k x Standard Deviation
Where Mean MAE is the average adverse excursion across all analyzed trades, Standard Deviation measures the spread of MAE values, and k is a multiplier (typically 1.0 to 2.0) that determines how conservative the stop placement is. Higher k values create wider stops with fewer premature exits but more risk per trade.
Worked Examples
Example 1: Day Trader Stop Loss Optimization
Problem: A day trader records MAE (in pips) for 20 trades: 25, 15, 40, 10, 30, 20, 35, 18, 45, 12, 28, 22, 33, 8, 42, 16, 38, 20, 27, 14. Current stop is 50 pips. Optimize.
Solution: Mean MAE = 24.4 pips\nStd Dev = 10.8 pips\nMedian = 23.5 pips\n90th percentile = 42 pips\nMean + 1.5 SD = 24.4 + 16.2 = 40.6 pips\nMean + 2 SD = 24.4 + 21.6 = 46.0 pips\nEfficiency ratio = 24.4/50 = 48.8%
Result: Moderate stop: 41 pips | Conservative: 46 pips | Current 50-pip stop is 12% too wide (48.8% efficiency). Tightening to 41 pips would improve RR by 18%.
Example 2: Swing Trader MAE Analysis
Problem: Swing trader MAE data (pips): 50, 35, 80, 25, 65, 40, 55, 30, 70, 45, 60, 35, 75, 20, 85, 40, 55, 30, 68, 38. Current stop: 100 pips.
Solution: Mean MAE = 50.1 pips\nStd Dev = 18.4 pips\nMedian = 47.5 pips\n90th percentile = 80 pips\nMean + 1.5 SD = 50.1 + 27.6 = 77.7 pips\nMean + 2 SD = 50.1 + 36.8 = 86.9 pips\nEfficiency ratio = 50.1/100 = 50.1%
Result: Moderate stop: 78 pips | Conservative: 87 pips | Current 100-pip stop has 50.1% efficiency. Reducing to 78 pips saves 22 pips risk per trade.
Frequently Asked Questions
What is Maximum Adverse Excursion (MAE) in trading?
Maximum Adverse Excursion (MAE) is the largest unrealized loss experienced during a trade before it either hits the stop loss or reaches the take profit target. Developed by John Sweeney in the 1990s, MAE measures how far price moves against your position at its worst point during the trade. For a long trade entered at 1.1000, if price drops to 1.0960 before rallying to hit your take profit at 1.1100, the MAE is 40 pips. By analyzing MAE across many trades, you can determine optimal stop loss placement that protects against normal adverse movement while avoiding unnecessary stop-outs from setting stops too tight.
How do I interpret the result?
Results are displayed with a label and unit to help you understand the output. Many calculators include a short explanation or classification below the result (for example, a BMI category or risk level). Refer to the worked examples section on this page for real-world context.
How do I get the most accurate result?
Enter values as precisely as possible using the correct units for each field. Check that you have selected the right unit (e.g. kilograms vs pounds, meters vs feet) before calculating. Rounding inputs early can reduce output precision.
How accurate are the results from Maximum Adverse Excursion Calculator?
All calculations use established mathematical formulas and are performed with high-precision arithmetic. Results are accurate to the precision shown. For critical decisions in finance, medicine, or engineering, always verify results with a qualified professional.
Is Maximum Adverse Excursion Calculator free to use?
Yes, completely free with no sign-up required. All calculators on NovaCalculator are free to use without registration, subscription, or payment.
Can I use the results for professional or academic purposes?
You may use the results for reference and educational purposes. For professional reports, academic papers, or critical decisions, we recommend verifying outputs against peer-reviewed sources or consulting a qualified expert in the relevant field.