# Percent rank

`percentrank`

Where the value sits among its previous values, from 0 to 100.

## Inputs

| Name | Type | Default | Range |
| --- | --- | --- | --- |
| source | source | close |  |
| period | int | 100 | 1 to 5000 |

## Outputs

| Name | Kind |
| --- | --- |
| percentrank | value |

Warm-up: period bars (100 at the defaults).

Repaints: No.

## Formula

The share of the previous period values that are less than or equal to the current value, from 0 to 100. The current bar is compared with the bars before it, not with itself. A window holding a missing value has no value.