Open orders are un-filled orders, or trades that have not been executed and are not part of your positions. When you place an open order, bitcoin or dollars may be locked on your account to fulfill the order if it is executed against. This will be reflected in your Order Locked balance.
With our order system, you are allowed to use the same collateral against multiple orders, but as soon as one order is executed we'll cancel any other orders that do not have sufficient collateral. Your orders will remain open if you do have sufficient collateral to execute the other open orders.
To cancel an open order, click the x button and then “Cancel Order”
You can place market orders and limit orders for bitcoin options. To place a limit order, simply enter your desired Quantity and Price and click the Buy or Sell button.