因为价格每天都有波动,那么我们就抓住这些波动来做文章。比如,如果你昨天有50Hand duvet covers, you can buy them today first10Hand, then equivalent it and sell it again10Hand; You can also sell it first10Hand, then wait for the price to come down. Buy again10Hand, when the market closes today, you still50手,但已经*过一个或几个来回了。一进一出或几进几出,资金增加了,这样就可以降低成本,直到解套。这个技巧与向下差价法、向上差价法的区别在于,它是当日就会有几个来回,而向上、向下差价法则不一定是当日做单,可以过几天做一个来回。