Mind Monitor

Does anyone have any ideas or experience in defining what might be 'deep sleep' using the Mind Monitor online graphing tool?
Looking at the red Delta wave line in the Relative plot below, it looks like somewhere above 0.40 or 0.45 or maybe even above 0.50 might be appropriate? This guesstimate is just based on how I feel the next day, nothing scientific.

The Muse app produces a simple plot (hypnogram) of time spent awake, in REM sleep, light sleep and deep sleep. But I don't find this tiny graph specific or detailed enough to be very useful.

I'm not sure about deep sleep, but the red Delta you're seeing in your graph isn't likely to be actual Delta, or may be artifically exagerated.
It's much more likely to be EMG (muscle movement) interference, as on the chart I can see numerious J- Jaw Clench and BF - Bad Fit markers.

...on the chart I can see numerious J- Jaw Clench and BF - Bad Fit markers.

Yes, I have noticed they are a regular occurrence on my charts.
I sleep on my side and change sides quite a few times during the night. Also I get up out of bed a few times. Could the markers be caused by these kind of movements? Maybe comparing the J and BF markers to the Accelerometer and/or Gyroscope charts might give me a clue?

One more question James, how does muscle movement interference impact the Delta wave recording exactly? Or does it affect the recording of all brain wave data?

It gets interpreted as a low frequency wave, so only Delta is impacted in that regard.