maggie_品职助教 · 2019年11月07日
immediate or cancel:are good only upon receipt by the broker or exchange. If they cannot be flled in part or in whole, they cancel immediately. 该指令是有效性指令，该指令在下达时如果不能被满足，那么就全部取消。
all or nothing:An order that includes the instruction to trade only if the trade flls the entire quantity (size) specifed.这是一个交易指令，只有当交易被全部满足时才执行。
