If I charm an opponent's merchant, does their merchant trigger? What is considered a move vs not a move?

Ruling: If a unit moves, it moves and triggers "When I move" effects. Recall is not considered a move (cards specify "this is not a move" for recall). Charming an opponent's merchant causes it to move and trigger.

Nuances:

• "This is not a move" text is specifically for recall effects
• When moving to a battlefield, "When I move" triggers must resolve before combat/showdown can begin