We have a client who needs to compare two types of attributes inside the same graph/chart.
This is already possible in the web based operations dashboard, but if the values are very different, e.g. one attribute value ranges from -2 to 4 and the other from 1000 to 5000 the graph just shows something like two almost straight lines on the bottom and top of the graph.
The units for each datatype need to be specified in the title/description of the graph instead of adding them to the Value Axis properties.
Basically this type of charts is also frequently used in climate diagrams to compare rainfall and temperature.
I mentioned this enhancement in the Beta Program, but it doesn't look like that it has been taken into consideration so far or if there is a chance that it may be implemented.