Since the only replies to a question about whether this is possible was others with the same question, I’m assuming it’s not.
I would like to suggest that a possibility was included to make a graph over data in an attribute, that is not changing over time (in the conventional way).
As an example, I’m using the nordpool sensor that, in the attributes, shows what electricity will cost over the day (and, after 13:00, also the following day). So something like this is the attributes:
today: 1.423, 1.358, 1.345, 1.355, 1.366, 1.366, 1.363, 1.368, 1.429, 1.451, 1.479, 1.474, 1.476, 1.451, 1.452, 1.477, 1.497, 1.766, 1.587, 1.302, 0.977, 0.975, 0.974, 0.837
tomorrow: 0.791, 0.785, 0.746, 0.516, 0.458, 0.471, 0.691, 0.785, 0.904, 1.115, 1.255, 1.356, 1.461, 1.438, 1.44, 1.472, 1.733, 2.076, 2.261, 1.949, 1.442, 1.482, 1.378, 1.346
These values change twice per day (at midnight tomorrow become today, and at ~13:00 new values for tomorrow are released). It would really nice to be able to graph this in Hass too get a easy visual of when to e.g. charge the car.