# In Short

MeritOrderMessage can be used to receive forecasts on supply and demand books.
To this end, all components of supply and demand books are transferred using the [Portable](../../Glossary.md) interface.

# Details

Contained information

* `supplyOrderBook`: the supply-side order book
* `demandOrderBook`: the demand-side order book
* `timeStamp`: the TimeStamp the merit order is valid at

# See also

[MeritOrderForecaster](../Agents/MeritOrderForecaster.md)