Indicates the percentage of the allowed screentime used
Shows the ratio between the passage of time and the usage of the screen.
Defined like that:
correctUsageIndicator = Percentage of screentime used / percentage of day passed
correctUsageIndicator < 1 - Green
correctUsageIndicator > 1 - Red
correctUsageIndicator == 1 - Orange
The color will be orange also if the value is close to 1 but not exactly one.
The rest is clear IMO