Why is health dashboard help showing if an even was received in the last x minutes?

[Keo]

Hi all.  I am very new to splunk so please be gentle here. 🙂

I have the following json payload being updated in our splunk index.

{
  "status": "open",
  "description": "some information here"
  "severity": "unknown",
  "ingestion_source": "source type here"
}

What I want to do is have a tile that is per ingestion_source that turns red if a new payload hasn't been received in the last 5 minutes.

I know how to make the query, I am just struggling with how to make the dashboard do what I explained.

Any help is much appreciated.