If you prefer to see the sensor averages to display on the map dots, check “Averages as Show Rings” on the map controller. The rings give a visual display of the average historic readings, showing the same averages you see when clicking a specific sensor.
Each ring represents an average for a time range:
Center of the circle = Real-time average
1st ring = Short-term average
2nd ring = 30-minute average
3rd ring = 1-hour average
4th ring = 6-hour average
5th ring = 24-hour average
6th ring = 1-week average