In practice, both are very fast up or down, and once a sign of a breakthrough, should be reached in advance (or From), after a breakthrough is often too late.

• 在实际操作中，无论是上涨还是下跌都是极快的，一旦出现突破的征兆，应提前杀入(或杀出)，突破后往往已经来不及了。