In fact, any persistent form can turn into a reverse form, and a reverse form can turn into a persistent form at any time. Such as symmetrical triangle, triangle rising, descending triangle, horn, flag, rectangular, after the shock, the five small band should be breakthrough in the direction of the trend line, to complete the form, but at the end of the running of the 5 wave oscillation, cannot afford to the original direction of break line, it broke through the contrary to the trend line on the other side of the line, form into a reversal pattern.