Hi, There is the possibility to add user defined metrics in the DMI which you calculate as a formula using the other metrics. But as far as I remember you can do it using metrics from the same data view (which is I'm not sure you can do what you requested as the metrics you mention are from 2 different dataviews). Reference:
Hi @Hans H.,
to add something more on what Roberto answered already:
The functionality hasn't changed in 12.4 releases so you should be able to apply the same rules in the creation of your custom metrics.
Time ago I wrote a guide on how to do that with some examples, here:
Hope that helps.