It is of value to be able to relate different time series data logs to each other. In most industrial trend packages you can display data from logs that have different engineering units. This allows you to, as an example, only, compare the temperature over time with the relative humidity. The two are related to each other with the common factor being water contents. Any deviation between the standard relationship indicates air exchange with the environment. Another example would be to be able to have power and temperature in the same graph allowing you to see the effect of adding heat to compartment.
What is needed in order to get a more flexible insight display function is to be able to have graphs with more than one engineering unit and to be able to scale individually per graph pen.
I fully understand that I can export data and visualize in a separate package, something I do today. However, having the function natively in Homey would make it so much easier for the average user to study and optimize his application of his smart home devices and probably be educational at the same time.
