If your condition is greater than zero, then why are you doing a 24 hour window? Set the search window to the same as your cron schedule. So only search the last 5 minutes. That way you only get unique instances.
Or are you needing to do the 24 hour and want to implement throttles so you don't get nagged about the same issue every 5 minutes? If so, then set thresholding.
Thanks for your assistance but It will not work if u see me corn schedule then you will understand that alert should trigger between 8 am to 10 am, so 1st alert of the day should be on last 24 hours or last 22 hours (i.e. yesterday's 10 am to today's 8 am) then after that if I applied on last 5 minutes then it's fine but if we mention 5 minutes initially then 1st alert of the day will run from 7:55 am to 8 am which is not desirable.