<img width="605" alt="Screen Shot 2020-04-07 at 12 18 48 PM" src="https://user-images.githubusercontent.com/1445834/78699737-fa38af80-78c9-11ea-8694-19baea97333e.png"> You should only be able to click `Save` on an alert without a metric if the `Document count` aggregator is selected.
You should only be able to click
Saveon an alert without a metric if theDocument countaggregator is selected.