How to trigger Automatic actions from Action engine

Hi team,
I am currently new to IBC and am exploring the features of action engine. One thing i came across was to automatic actions that can be taken once an signal is detected. For Ex, when an signal is detected, i have allotted a specific Email action to be triggered for certain recipients. But as i see this, when a signal is detected, the action is detected, but it is a manual work to send it. How do i automate it? As i can see a method as “Automatic action”.

Thanks in advance