How to sync my time series with my alerts so I wont get data missing error

I have a time series that gets 1 data point per minute. I want to set up an alert that tells me if I am getting no data. The issue I am facing is that I have the data point come at 10:00:00 and the alert is going off on 10:00:30 so basically 30 seconds too late. How can i sync the alert with my data so the alert checks the series at the same time the series get the data point.