Use your scope to focus on your Transaction specifically, or focus on the Recording ID if you want to alert on that Recording having issues on any player.
Set your condition to = UP and click to the summary page of the alert to get the blue box saying it would alert on these things. Make sure your entity is present. And if you want to alert only on specific items adjust your conditions (use back, button
*Do NOT save it, click back or use the built in bread crumbs to go between the conditions and final summary page for details about what items would instantly trigger the alert.
Once your conditions and your instant trigger items are desirable then change your condition back to = DOWN.......( or you could use a <> UP & <> Unmanaged if you want alerts for when the transaction has issues in one way or another).