Quantitative 1. The length of wave b of the platform type adjustment must be greater than 0.618 of the length of wave a. Otherwise, the adjustment wave should be classified as a zigzag type; and must be less than 1.382 of the length of wave a. Otherwise, at this time, the Wave b may not be wave b in the correction wave, and a new impulsive wave should be considered.

Quantitative 2. The maximum length of wave C of platform adjustment should not exceed the length of wave a of 2.618. Otherwise, the previous wave shape should be re-understood.

Quantitative 3. The length of failed wave c must be at least 70% of the length of wave b.