Setting up alert with "reduce" last value, getting "no data"

Hey everyone! I am trying to setup an alert for one of my metrics and getting no data after I do a reduce function using last value evaluation. I am not sure why this is not working. Please let me know what I am doing wrong? Thank you! Screenshot is in the thread. :ty:

I’m sending metrics through HTTP API to graphite, and in metrics explorer I am able to see this:

So I am assuming that is why my last value renders no data. I am sending my metrics every 20 minutes, but why does this table has a row for every 20 seconds?