"So if you place a Good-Till-Cancered Stop order to buy one contract on Spot EUR/USD (which is undated and has no expiry) and the order level is never reached nor do you instruct us to cancel the order, we would continue to work that order for you indefinitely."

Foreign Exchange Spot Deal是指即期外汇交易，那么我假设Spot EUR/USD中的spot也是指即期，但是又说合约是undated and has no expiry，即合约没标明日期，是无限期的。一个“即期”，一个“无限期”，看上去好矛盾。我理不清当中的逻辑关系。

外汇交易小白还请高手赐教。能不能举例说明一下？谢谢！