What Does Williams %R Actually Read on GBPUSD 15-minute Charts?
Educational reference. Measured from 5,073 recorded values on British Pound / U.S. Dollar 15-minute charts through September 4, 2026.
The middle half of all readings sat between -76.09 and -23.74, with a median of -48.28.
Williams %R measures where the close sits in the recent range, expressed from 0 down to −100. This page reports what it actually read on British Pound / U.S. Dollar 15-minute charts — not what it is supposed to do, but the distribution of 5,073 recorded values over the last 90 days.
| Series | Median | Middle half | 5th / 95th | Full range |
|---|---|---|---|---|
| Williams %R | -48.28 | -76.09 – -23.74 | -95.07 / -4.74 | -100.00 – 0 |
The median is the middle reading, so a single unusual session cannot drag it. The middle half is where Williams %R sat on half of all bars — the range you should expect to see most of the time on this chart.
How often it reaches the levels people watch
| Reading | Bars | Share |
|---|---|---|
| Above -20 | 1,084 | 21.4% |
| Between -80 and -20 | 2,943 | 58.0% |
| Below -80 | 1,046 | 20.6% |
Williams %R spent 58% of its time between -80 and -20 on this chart. A reading beyond -20 appeared about once every 5 bars, and below -80 about once every 5. How rare a signal is matters as much as what it says.
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How this was measured
Every 15-minute bar of British Pound / U.S. Dollar recorded in the last 90 days was read, and the values grouped without smoothing or filtering. Series with fewer than 400 readings are omitted rather than shown on thin evidence. These are recorded values, not forecasts.