Marginally related: the lasted patched webCoRE for Hubitat includes support for fuel streams, which can be used to graph data if that was your intent (it really was for mine, so if I get this working it will probably be good enough for me). Eventually they plan to support it on the "public" webCoRE server, but for now you'll need to host your own webCoRE Dashboard locally (also explained in the above thread--I resisted until this and can't believe how much faster the editor loads, by the way).
Just a thought if graphing was really your intent!
