European electricity market: day-ahead spot prices (EUR/MWh, 15-minute or hourly) for a bidding zone such as DE-LU, FR, NL, BE, AT, PL, DK1, NO2, SE3, IT-North, with min/max/average for the day, and optionally the cross-border physical flows (GW, positive = import) between a country and each neighbour. Data from ENTSO-E/SMARD as republished by Fraunhofer ISE's Energy-Charts API; licence string returned with each answer.