> ## Documentation Index
> Fetch the complete documentation index at: https://docs.codex.io/llms.txt
> Use this file to discover all available pages before exploring further.

# PredictionOrderBookLevel

> A single price level within a prediction outcome's order book. Polymarket and Kalshi.

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  ## GraphQL

  ```
  type PredictionOrderBookLevel {
    price: Float!
    size: Float!
  }
  ```

  ### Used By

  **Returned by**

  * [predictionOutcomeOrderBooks](/api-reference/queries/predictionoutcomeorderbooks.md): Returns live order books for a set of prediction outcomes, fetched from the venue's CLOB. Polymarket and Kalshi; outcomes from other venues will return null. Cached for up to 10s.
</div>