If the 2 streams are in the same engagement program, you can use transition rules. Go to the second stream, and click the "transition rule", then add the relevant triggers. Just remember that a transition rule "pulls" leads into the stream. You can also use a separated smart campaign.
If the 2 streams are not in the same Engagement program, you will have to pause them (use a "change engagement program cadence" flow step) in the previous engagement program and add them to the new one.
1 of 1 people found this helpful
The trigger is likely something like Converted or Data Value Changes.