How to send alerts when a winprocessstat datasource returns no data?

I can see the datasource and see data being gathered for the selected datapoints. I have alert thresholds set in case those datapoints reach certain thresholds.

There was a dip today where no data was returned, because the datasource (a Windows process) was turned off. This did not result in any alerts.

How do I configure Logimon so that it does send alerts when the datasource fails to return any data on its datapoints?