Most mood tools ask one question and stop: how do you feel, zero to ten? Here's what that misses — and today we build the measurement that actually sees it.
Two people can log the exact same weekly average — a five, most days — and be living completely different weeks. One person's five barely moves. The other's five is an average of a two and an eight, every single day. Same number. Completely different experience. A single average erases the difference entirely. This session builds the measurement that doesn't.
Within-day range. Take today's three check-ins — morning, midday, evening. Find the highest and the lowest. The gap between them is today's within-day range. A big gap means today itself was a rollercoaster, even if the daily average looked ordinary.
Day-to-day range. Line up each day's average against the one before it. A steady week holds close to a flat line. A volatile week jumps — up sharply, down sharply, day after day. This is a different number from within-day range, and both matter.
Together, they build the range band — a shaded width around your level line. Wide on a rough day or a rough week. Narrower on a steadier one. The line shows where your mood sits. The band shows how much it's moving. The band is the headline of this whole program.
This changes the target. We're not chasing a higher mood number — some weeks that number will be exactly the same as last week's. We're watching the band. A narrower band, even at the same average, is a real, measurable win. Every week, your review reads both numbers together — within-day and day-to-day — as one score: your volatility index. It's the chart you'll come back to every single week of this program.
Two or three days of data won't tell you much yet, and that's normal, not a problem.