> For the complete documentation index, see [llms.txt](https://docs.fractalworks.io/joule/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fractalworks.io/joule/components/analytics/analytic-tools/analytic-functions/stateless/statistics/weighted-moving-average.md).

# Weighted moving average

## Objective

Provide a weighted moving average of the provided event attributes

## Example

```yaml
time window:
  emitting type: slidingWeightedAverages
  window functions:
    stats summary:
        function:
           weighted moving average:
             parameters:
               period: 500
        attributes: [ ask,bid ]
  policy:
    type: slidingTime
    slide: 500
    window size: 2500
```

### Output attributes

After processing, attributes receive automatically applied postfix ID = `WMA`

| Before processing | After processing | Type         |
| ----------------- | ---------------- | ------------ |
| ask               | ask\_WMA         | double value |
| bid               | bid\_WMA         | double value |