The Daily view stacks one night's channels on a shared time axis. Read it top to bottom and the night tells a story. Flow rate — the breath-by-breath trace. This is the channel every event is scored from, and the one worth zooming into. Flattened tops, a sawtooth, or a run of shallow breaths followed by a big recovery breath all look distinct once you have seen them. Pressure — what the machine delivered. On an auto machine, watch where it rises: a pressure that climbs and then holds is responding to something. Leak — the channel that invalidates everything else when it goes wrong. A high leak stretch means the machine's event scoring over that stretch is unreliable, so read leak first and events second. Event markers — apneas, hypopneas, and the machine's own extra event types. Their clustering is usually more informative than their count. Snore / flow limitation, where your machine records them. Oximetry (SpO2 and pulse), when a compatible oximeter recorded that night. Three habits worth having: Zoom in. A whole night squeezed into one screen hides everything interesting. Ten-minute windows around a cluster are where the answers are. Check the axis before you react. Charts auto-scale; a dramatic-looking excursion may be two units wide. Nights run noon to noon. A session starting at 1 a.m. on the 15th belongs to the 14th's night. This is deliberate and it is why "my night is missing" almost always resolves to "it is on the previous date". Post a night in Data Talk if you want a second pair of eyes — there is a topic there on how to share a screenshot safely first. Nothing on SomniTalk is medical advice. Talk to your own clinician before changing therapy.

AHI — the average number of apneas and hypopneas scored per hour of therapy — is the number everybody fixates on, because it is a single digit and it goes up and down. It is genuinely useful. It is also routinely over-read. Things worth holding onto: It is an average over a whole night. Two nights with the same AHI can look nothing alike: one with events scattered evenly, one with a clean first half and a wall of events at 5 a.m. The second is telling you something the number is hiding. Night-to-night variation is normal. Alcohol, a cold, a late meal, sleeping on your back, a bad mask night, or simply more REM will all move it. A single high night is not a trend; three weeks of drift is. Your machine scores events its own way. Manufacturers do not all define or detect events identically, and no home device is doing what a scored sleep study does. Compare your machine against itself over time, not against a friend's different machine. A low AHI does not automatically mean you feel well. Leak, arousals, mask discomfort and plain insufficient sleep are not in that number at all. The useful question is almost never "is 3.2 good?". It is "what changed, and does the shape of my nights match how I feel?". If you want the longer version, the Reading Your CPAP Data section of the Library covers AHI, RDI and how severity bands are drawn. Nothing on SomniTalk is medical advice. Talk to your own clinician before changing therapy.