As an European with a fixed-Euros-per-kWh-contract (with two prices, one for daytime, one for nighttime, the latter being a bit cheaper), I'm curious - which countries allow you to get a contract in which your electricity costs get updated daily?
Your actual contract would be with some local electric company that uses Nord Pool (or some other provider).
Since German prices are on that map, I assume there are at least some companies doing that in Germany too.