How Far Away Should a Stop Be?
https://fxabsolute.com/stats/GBPUSD.json.
How often GBP/USD covers a given distance
| Distance (pips) | As a multiple of the median | Share of days reaching it |
|---|---|---|
| 21.9 | 0.25× | 100% |
| 43.9 | 0.5× | 96% |
| 65.8 | 0.75× | 77% |
| 87.7 | 1× | 50% |
| 109.7 | 1.25× | 28.5% |
| 131.6 | 1.5× | 17% |
| 175.5 | 2× | 6.3% |
Read it the other way for a stop. A stop 43.9 pips away is inside the range on 96% of days, which means ordinary movement reaches it on 96% of days regardless of whether the idea was right.
The same distances, across the majors
| Instrument | Unit | Median day | 1.5× median | Share reaching it |
|---|---|---|---|---|
| GBP/USD | pips | 79.5 | 131.6 | 17% |
| EUR/USD | pips | 61.6 | 103.5 | 18.4% |
| USD/JPY | pips | 89.1 | 153.1 | 22.5% |
| GBP/JPY | pips | 119.8 | 200.5 | 21.4% |
| Gold (XAU/USD) | pips (0.1) | 249.8 | 420 | 25.6% |
Stops and the gap
A stop is also only as good as the fill. GBP/USD's 95th-percentile weekend gap is 30.9 pips, and the largest in the sample was 254.1. A stop inside that distance was not honoured at its price on those days, however wide it looked.
Neither table says what distance to use. They say what a given distance is asking the market for, which is the part usually assumed rather than checked.
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Questions
How many pips should a stop loss be?
The data does not prescribe a number; it says what each distance costs. On GBP/USD, 43.9 pips is inside the daily range on 96% of days, so a stop there is reached by ordinary movement most days.
Is a 20 pip stop too tight on GBP/USD?
GBP/USD covers 21.9 pips on 100% of days, so yes — a stop that size sits well inside normal noise and will be taken out by movement that means nothing.
Does a wider stop guarantee survival?
No. Gaps skip stops entirely: the 95th-percentile weekend gap on GBP/USD is 30.9 pips and the largest was 254.1.