Normally the count that you see rising is during:
Hours on weekdays between 07:00 and 23:00, or
All hours on Monday to Friday between 08:00 and 20:00. This depends on your network operator
Low is the count you see rising during:
Hours on working days between 23:00 and 07:00, and all hours on Saturdays, Sundays and recognised public holidays, or
All hours on Monday to Friday between 20:00 and 08:00, and all hours on Saturdays and Sundays. This depends on your grid operator.