Can you play Flash in response to Traveling Merchant's move trigger, and how do multiple move triggers resolve?

Ruling: Yes, you can play Flash in response to Traveling Merchant's move trigger. When Flash resolves and moves the Merchant again, there will be two move triggers on the chain.

Sequence:

• Opponent plays Charm, moving Traveling Merchant from your base to a battlefield
• Charm resolves, Merchant moves and its move ability triggers
• You can play Flash in response to this trigger
• Flash resolves, moving Merchant again and creating a second move trigger
• First move trigger resolves: draw 1 card
• Second move trigger resolves: if you have no cards in hand, draw 1 card; otherwise discard your hand and draw 1 card

Nuances:

• At the point after Flash resolves but before triggers resolve, the Merchant is not yet an attacker and your opponent is not yet a defender
• If the card drawn from the first trigger is a reaction, you should consider playing it before the second trigger resolves, as you would otherwise discard it