Adding charts to Overview?

[bstabens]

Can I put my own charts in there, apart from the default five?

Problem is, I'd need a chart for my deep sleep states, and there are only the daily ones. Any chance I could get a summary of these? Like, how many on average per night?

[pholynyk]

I haven't looked at the code for the Overview page, so I have no idea how hard it would be to add hooks for adding arbotrary oser charts.
At this point I wouldn't hold your breath, unless you can dig in and look at he code yourself.