Hey tamara163, a buy order is confirmed and executed as soon as there is 1 confirmation on the bitcoin blockchain. IIRC, if there's not even a single confirmation of the BTC txn on the chain after an hour, then the transaction goes stale. If your BTC is stuck in limbo, the team will resolve this very promptly if you give them a heads up on the #market channel of Merit Discord (https://discordapp.com/invite/X3v3n3b).