alert on search result that are higher than a specific value in the column

I am trying to trigger an alert based on a value that is in a column. Below is the search I am running |`node_details(SERVER NAME)` | search Node_ID="Node3" (stats.key="node.cpu.sys.max" OR stats.key="node.cpu.user.max") | eval usage_by = case('stats.key'="node.cpu.user.max", "User", 'stats.key'="node.cpu.sys.max", "System") | eval stats.value = round(('stats.value'/10),1)| timechart span=5m avg(stats.value) by usage_by basically I want to alert anytime the System is greater than X. I have tried using customer alert condition and have added where System > 4 but that has not helped. Can someone recommend a solution please? Thanks ![alt text][1] [1]: /storage/temp/254918-usage.jpg