The Fill-or-Kill order (FoK) is a limit buy or sell order that has to be filled entirely or it is cancelled. This means that you will always buy or sell the exact amount of crypto at the exact price you specified. However, if the order book doesn't hold enough units to fill your order, the order will be cancelled.

Fill-or-Kill orders are supported through our REST and FIX APIs, but are currently not available through our webpage and app.