I've been using my Hexoskin to record my sleep data and I find it fascinating. I would like to know more about some of the metrics you report. For example, can I see when you detect sleep (REM, non-rem, etc) vs. wake periods? Also, data like HRVHFnormAvg (%)... How is this computed? Similarly the app provides different metrics, such as HRV (%). Is that the same as HRVHFnormAvg (%)?