BlockTrades (https://blocktrades.us) will be upgrading its steem wallet to 0.16 hardfork client tomorrow morning (approximately 9am Eastern Standard Time). Because of the significant nature of the changes made to the new client with regard to the way blocks are stored in shared memory and resulting changes in performance on virtual machines plus the need for a full resync of the blockchain, BlockTrades may not be able to process Steem transactions for several days until we've successfully synced the new wallet.
Therefore, if you wish to buy or sell Steem or Steem-backed dollars via our service, it's recommended that you place your orders prior to the beginning of the upgrade tomorrow morning.