Notify if a file has not been modified

Been doing a lot of searching and think I am close, just need some further help on the threshold trigger and if it is possible. Just like in this thread https://helpdesk.paessler.com/en/support/solutions/articles/66137-file-sensor-notify-if-no-change-in-file-size-time-stamp I need to be notified if a time stamp does not change within a certain amount of time, in my case 5 minutes. I have the file being watched so all is good there but I have an object trigger set up as such - Threshold Trigger - When the Last modified channel is Above 300 for at least 60 seconds perform - x Alert

My assumption is that Above is in seconds and 300 = 5 minutes, and the at least 60 seconds should send me an email if the file is older than 6 minutes. Am I correct with this?

Thank you.