# DIA

Meridian Finance's USDM stablecoin is powered by a custom price oracle provided by [DIA](https://diadata.org/), designed for robust, real-time asset pricing.

**Data Sourcing**

This oracle utilizes a high-frequency, 120-second data aggregation window and fetches data from a curated list of over 20 exchanges. You can view the feed’s data sources in real time on the [DIA APP](https://www.diadata.org/app/price/asset/Ethereum/0x0000000000000000000000000000000000000000/).

**Pricing Methodology**

The price calculation employs the Moving Average Price with Interquartile Range (MAIR) methodology. For an in-depth explanation of the pricing mechanisms, consult [DIA's Technical Documentation](https://docs.diadata.org/products/token-price-feeds/exchangeprices/mair-moving-average-with-interquartile-range-filter).

**Update Mechanism**

The smart contract for this oracle employs a deviation-based update mechanism with a 0.5% threshold. Any price change greater than this value triggers an immediate on-chain update. 

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To view the oracle’s most up-to-date configuration, always refer to the [DIA Forum, under Custom Delivery Request CDR #058](https://forum.diadata.org/t/cdr-058-meridian-finance-price-feed-on-base/789)