How to use emoncms ? Inputs, Feeds, ...

Hi.

I have just succeed in plug in my Raspberry Pi on my electric counter and send data to emoncms plateform :

But now, I'm stuck. I don't know how to build a graph or a dashboard with those data.

For exemple, the HCHP value is total W consumption (from 07:30am to 11:30pm) since my house is build. This value is always increasing so how can I transform it to get kWh/day consumption and have such nice graph like :

Thanks for your help.