An overall view that had each channel of the expansion module as a colored line on the main graph would be a very useful addition. It would make reading the graph and identifying the source of usage spikes easier and more intuitive. I have mocked up some examples and attached them. They are crude photoshop jobs and of course there are many good ways to accomplish the same thing, but as they say picture is worth 1000 words
I honestly assumed the graph would allow this (multi select when selecting the circuit). I spent some time taping around thinking I was just missing it.
Please please please add this, as well as pinch to zoom 🙂