The AHI graph you asked about, that is just an hourly AHI count. Starts over each hour.
You have times with nothing going on and then the times with a little going on you get the hourly index or average.
|Mask: AirFit™ P10 For Her Nasal Pillow CPAP Mask with Headgear|
|Humidifier: S9™ Series H5i™ Heated Humidifier with Climate Control|
|Additional Comments: S9 Adapt|