In the App, we have two types of status, the Session and the Agent. When you look at the Chord Diagram (the circle graph on the Home page), the session status is the color of the line between the two agents. The agent color is the status of the agent itself (no matter in the sessions are up, down or degraded).
If one Agent is down, the sessions will go dark red, same thing for the agent that is down. You should see the second agent green…
FYI, we consider an agent being down if the agent is not connected to our cloud.