# In Short

Summarizes all needed data from the local exchanges to perform the market coupling and stores its result.
A `CouplingData` object contains: a `SupplyOrderBook` for supply bids, a `DemandOrderBook` for demand bids.
In addition, it covers a `TransferOrderBook` for import bids, another `TransferOrderBook` for export bids, and `TransmissionBook` for transmission capacities.

# See Also

* [OrderBook](../Modules/OrderBook.md)
* [TransferOrderBook](./TransferOrderBook.md)
* [TransmissionBook](../Modules/TransmissionBook.md)