Plugwise Adam HA - Boiler activity readings - can someone explain?


I have a question about the readings that I get from my Boiler shown in Adam.

Currently it shows a lot of activity and large temperature spikes in a short time frame.
I was wondering if this is normal behaviour for an open therm thermostat or that something is wrong?

And on a side note can someone explain me the activity graph? it has to do with the spikes in the boiler temperature graph I think, but I don’t know what the orange and black are in that graph as it’s in percentages and not in temperature reading.

Boiler graphs:

Thermostat readings:

Boiler specs: