How a change is detected
For each network separately, a median of its stations’ prices is calculated every day for AC, DC and HPC. A change is shown when that median moves by at least €0.01/kWh and at least 2% against the previous day with data, or when at least 20 of the network’s stations changed price that day (“at some stations”). Small daily swings, for example from dynamic pricing, are left out.
Follow the changes in a reader: Atom feed. A daily price chart is in the price history.