> ## 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. PredictionOrderBookLevel type reference: every field and its type.

## GraphQL

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

### Used By

**Returned by**

* [predictionOutcomeOrderBooks](https://docs.codex.io/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.


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