Please refer to Appendix B "Code Guideline" / "Data Source":

The orderbook data can be purchased from the EPEX Spot at: https://webshop.eex-group.com/epex-spot-public-market-data
Several data types are available. For example, the Continuous Anonymous Orders History for Germany costs 325€ per month. 

The data structure is organized as follows:

|- Country (e.g. Germany)
    |- Intraday Continuous
        |- Orders
            |- Year (e.g. 2025)
                |- Month (e.g. 01)
                |- Month (e.g. 02)
                |- Month (e.g. 03)
                ...
            ...
