# forge.ta.percentrank

```python
forge.ta.percentrank(source: ArrayLike, period: int = 100) -> np.ndarray
```

The share of the previous ``period`` values at or below the current value.

The result is from 0 to 100. The current bar is compared with the bars before it, not with
itself, so the first value is on bar ``period``. A window that holds a missing value has no
value.

Since Forge API 1.

## Class forge.ta.PercentRank

```python
forge.ta.PercentRank(**inputs: Any) -> None
```

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

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.

Since Forge API 1.