[AnnitaCL]

What do the blue, red, and purple lines on the graph mean? I check my blood sugar morning and evening and record it both times, but the graph shows three lines instead of two.

[dano]

The red line is the highest blood glucose reading of the day.
The blue line is the lowest blood glucose reading of the day.
The purple line is the Arithmatic average of all readings that you have input for the day.