Can each email in an automated series use a different trigger?

Hello,

I have setup an automated series that starts with someone joining the list and then 4-days later they get a second email. What I am wondering is if I can setup a different trigger for a third email based on a link clicked in the 2nd email in the series? It doesn't look like I can add another type of trigger into the series...so I'm thinking it isn't possible.

Thanks!