What data is showing on the sleep graph?

[Ddgaa]

• What does straight line on my sleep app graph mean? 

Moderator Edit: Clarified subject

[Ddgaa · Accepted solution]

Sp02 graph look normal except in Areas where is flatlining. What does that mean?  Band too loose, lacks skin contact? 

[SilviaFitbit]

@Ddgaa Welcome to the Fitbit Community. I've moved your post to this thread, in order to properly assist you. 

Note that your Fitbit will track sleep stages which you cycle through at night. Learn more about it in this article. 

In regards to the SpO2 data, you'll see trends on the Health Metrics tile, if you're not getting SpO2 data, check out this article for additional information. 

Hope this helps.