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

# Datasets

> Coverage, construction, and interpretation of Probalytics datasets

Probalytics combines venue data into three normalized datasets. Choose a dataset to see its coverage, source inputs, normalization rules, field meanings, and known limitations.

<CardGroup cols={3}>
  <Card title="Markets" icon="chart-line" href="/docs/datasets/markets">
    Market identity, outcomes, lifecycle, and resolution metadata
  </Card>

  <Card title="Fills (Trades)" icon="handshake" href="/docs/datasets/fills">
    Executions, prices, sizes, sides, participants, fees, and cash flow
  </Card>

  <Card title="Orderbook" icon="layer-group" href="/docs/datasets/orderbook">
    Full-depth books, reconstruction, validation, and continuity
  </Card>
</CardGroup>

## Understanding coverage

Each dataset page tells you:

* which platforms and products are included;
* when the available history begins;
* where the data comes from;
* how source data is transformed into Probalytics fields;
* which fields or records are not available.

Your plan controls which datasets you can query and how much history you can access. **All retained history** means the complete period Probalytics currently stores for that dataset. It may begin later than the exchange itself.

<Tip>
  If your query begins later than the coverage date shown on a dataset page, your account may have a shorter history window. If you should have access to more, please contact [support@probalytics.io](mailto:support@probalytics.io).
</Tip>