If a user timing metric has been defined, will data explorer pick up that corresponding metric? I would like to add a custom user timing metric to a chart. As I understand Dynatrace does support user timing metrics so I assume that the metric would display in data explorer
If you have created a new metric, it should also be available in the main menu (section observe and explore) under Metrics or also in the Data explorer. Before you can see them data for the metric should come in. Maybe that is a reason if you can't see/find them.
If you enter "calc" in the filter text field or in Data explorer, you should be able to find your created metrics.