I thought the same as you at first. But the "sleep quality" metric I'm using here is provided back from the JawboneAPI. It's yielded from some oddly weighted formula Jawbone uses.
That's a great point! I initially had labels along the x-axis and then removed them for simplicity. But looks like I went a little too far.
Each individual data point is total steps and or calories for a singular day. The count in the top right is for today (and it's always the last data point on the graph). Then it goes today-1, today-2, etc..
Thanks for taking the time to check it out and providing some feedback, I do appreciate it :)
I'm using a JawboneUP to track mood, steps, calories, and sleep. And the Withings Smart Body Analyzer to track weight, and heart rate. And a few open source gems to pull down the data: https://github.com/chocolit/dashboard