I realise that it is possible to get average values from sensors fairly easily, but is it possible to do the same for helper entities? I haven’t been able to find a way.
I have an automation the calculates the Solcast forecast accuracy each day, based on what the predicted solar generation was versus the actual solar generation. I have a card with a history graph that shows the daily variations in accuracy. I’d like to also have a running average for the accuracy figure. I could do this with another helper entity recording the number of days and then an automation to do the calculations, but is there a simpler way?