Processing orders can take some time, depending on network congestion.
The processing speed ranges from approximately thirty seconds to a few hours, depending on how long it takes for a block to happen on the network. On occasion, it can take as long as forty-eight hours to confirm.
Keep in mind that most orders process in just a few minutes. For some inputs, we will take zero-confirmation transactions. This is only if the transaction passes a number of zero-confirm "tests" that our system looks for. If it doesn't pass those tests, then the system will wait for standard confirmation on the blockchain.