Hello, I am creating an alert based on a quearry that gives me a table

What I want is to check in the table if exist several values, so I went to Universal Device Poller and creates a poller like this
I assigned it to the firewall and I look that its working


But wen I create an alarm the object is not the device itself is the Pooler results, no matter how I do it


If I write node node name "the firewall name" it doesn't like it I still get this alarm will be triggered on 18 objects (one per table row)

How can I check that this snmp query table contains a value?
regards