Show state of different entity and not the graph

[EmilonGitHub]

Hi guys,

I have my tablets battery life displayed like this:

For that I use the battery_level sensor:

I want to show somehow, that my device is charging when it's charging. For that, I need to use a different entity, but I do not want to have that entity included in my graph. I want to change the color of the graph or the Icon if my device is charging.
Is this possible?
Emil

[MSZ-Spyro]

Add

- entity: whatever
  show_graph: false
  show_state: true

under the second entity.