Estimated oxygen variations chart

[Crakmaster]

Looks like this is the only chart you cannot enlarge, and the only times you can see on the chart are the start and end times. I have been diagnosed with sleep apnea, and the chart indicates instances when the oxygen variation is high, I would like to see when those occur, but there is no time increments labeled on the time axis..?

[LZeeW]

Hello @Crakmaster and welcome to the Community.  In addition to your observation, the y-axis only says High and Low and doesn't have any frame of reference.  High or low compared to what?  Fitbit always adds the "not for medical purposes" to many of it's features.  This is a good example.  You should not even try to use this graph as all of its data is meaningless.  BTW, my background is human physiology, so I have the proper background to make this statement.

[Twinnannyof4gir]

Mine stopped showing Jan 31 was the last time I upgraded to Premium to see if that was why and still dosent show I have deleted and then reinstalled still nothing