On German exchanges, SMART routed orders are eligible to be executed from 9:00 to 22:00 CET.
Orders directed to FWB are eligible to be executed from 8:00 to 20:00 CET. Orders directed to SWB are eligible to be executed from 8:00 to 22:00 CET.
It is not required to define a specific setting in the trading platform to trade during these hours. The orders are routed as per above by default.
Additional Information