# CAR#005: Volume Weighted Average Price with Interquartile Range Filter (VWAPIR) | Methodology

**URL:** <https://forum.diadata.org/t/car-005-volume-weighted-average-price-with-interquartile-range-filter-vwapir-methodology/186>\
**Category:** CARs - Community Approval Requests\
**Tags:** methodology\
**Created:** [February 18, 2022, 10:31am UTC](https://forum.diadata.org/t/car-005-volume-weighted-average-price-with-interquartile-range-filter-vwapir-methodology/186 "2022-02-18T10:31:42Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![emre.kara](https://avatars.discourse-cdn.com/v4/letter/e/cdc98d/32.png) [@emre.kara](https://forum.diadata.org/u/emre.kara)\
**Post date:** [February 18, 2022, 10:31am UTC](https://forum.diadata.org/t/car-005-volume-weighted-average-price-with-interquartile-range-filter-vwapir-methodology/186/1 "2022-02-18T10:31:42Z")

</div>

`Community Approval Request #005: Volume Weighted Average Price with Interquartile Range Filter`  
`Date: Fri, 18 February 2022`  
`Author: DIA Core Team`  
`Status: Approved`

In this fifth Community Approval Request (CAR), the DIA DAO community will discuss, improve and approve the Volume Weighted Average Price with Interquartile Range Filter methodology, a very commonly used filter by DIA for its oracle price determination.

The VWAPIR (Volume Weighted Average Price with Interquartile Range Clearing) filter is the application of the [Volume Weighted Average Price](https://docs.diadata.org/documentation/methodology/digital-assets/exchangeprices/vwap-volume-weighted-average-price) filter to data that was previously cleared by the [Interquartile Range](https://docs.diadata.org/documentation/methodology/digital-assets/exchangeprices/ir-interquartile-range-filter) filtering system.

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Filter Application

The VWAPIR filter is used in DIA’s price determination. Our API can display the latest MEDIR-120 filter values, i.e., the filter results from a 120 second interval of all recorded trades for an asset.

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Implementation

The filter is implemented as part of the FiltersBlockService in [this file in our Github repository](https://github.com/diadata-org/diadata/blob/master-ibm-tmp/internal/pkg/filtersBlockService/FilterVWAPIR.go)

## **[Head over to Snapshot to vote](https://vote.diadata.org/#/proposal/0x4df8660f951780cd128126ecc3cbd1c693dbece7efb5c2143ee700666f0d75be)**

### Timeline:

- **Discussion:** 18 Feb - 25 Feb
- **Vote:** 25 Feb - 4 March
- **Approval:** 4 March