Doubt in setting alerts in Grafana

Hello Grafana Community,

I am trying to create an alert in Grafana using a Lucene query on an OpenSearch index. But in the “Options” for the alert, I don’t see a way to select “Today” .

Right now, I am using a fixed time range like “last 30 days,” but I want the alert to check only for data from today.

How can I set the alert time range to “Today” or something similar that changes every day?

I attached a screenshot that shows my alert setup and the missing “Today” option.

Thank you for your help!