Studies · Statistical
Rolling Percentile
rollingPercentile · Rolling q-th percentile, linearly interpolated
Drawn over priceReads one column (close here)
Hover the chart to read values · practice data: a seeded random walk with no overnight gaps
What it measures
The q-th percentile of the last N closes. At q = 90, 90% of recent closes were at or below this line.
How traders use it
- Robust channel lines: a 90th and a 10th percentile make a band that one extreme bar cannot stretch.
- Regime levels: is price trading in the top or bottom of its recent distribution?
Parameters
| Name | Value | Default | Allowed | What it does |
|---|---|---|---|---|
| period | 20 | ≥ 1 usual 5–100 | Window length, in bars. | |
| q | 90 | 0 … 100 usual 5–95 | Which percentile, 0 to 100. 50 is the rolling median. |