A buy order is a bid on the marketplace. It signals that a buyer will purchase a certain number of bottles at a certain price.
When you place a buy order, your funds are removed from your account and placed on hold until the order is filled. You will be unable to use these funds for other purchases unless you cancel the buy order. If the order is not filled, your funds will be returned to your account.
A sell order is an ask on the marketplace. It signals that a seller will sell a certain number of bottles at a certain price.
When you place a sell order, the wines are removed from your account and placed on hold until the order is filled. You will be unable to place other sell orders with those wines unless you cancel the open order. Once your order is filled, the net profit will be added to your cash balance and the wines will be sent to the buyer’s trading portfolio.
Buy/sell orders do not expire. They will remain live on the marketplace until they are filled or you decide to remove them.