# forge.ta.wma

```python
forge.ta.wma(source: ArrayLike, period: int = 13) -> np.ndarray
```

Linearly weighted average: weight ``period`` on the newest value down to 1 on the oldest.

Also known as ``lwma``.

Since Forge API 1.

## Class forge.ta.WMA

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

Average that weights the newest value N times and the oldest once.

WMA[i] = (period * x[i] + (period - 1) * x[i-1] + ... + 1 * x[i-period+1]) / (period * (period + 1) / 2)

No value until period bars exist. A window holding a missing value has no value.

Since Forge API 1.