How to set up multiple conditions for our cron scheduled alert?

I have an alert scheduled to run on CRON. I wanted to trigger an alert when the number of results are less than X number with an attachment having the results. At the same time, I wanted to have the same alert to discard (not to include an attachment) if the number of results are less than or equal to ZERO (<=0). Do we have a way to have multiple conditions based on the number of alerts? I am aware of the custom condition, but trying to find a way to fit this scenario. Thanks Mathan J