@Raskolnikovhs, you are right but in some case it is also said wave three should not be the shortest and it would still follow the rule.
BabaGoli
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@diwasbhattarai, please look at educational charts:nr.6 =sep.10.2017,,nr.4 =sep.01.2017,,nr.2 aug.26.2017,,nr.3 aug.28.2017
BabaGoli
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@Raskolnikovhs, if you refer to the walls never, if you refer to the time spent (consumed), wave 2 is a corrective wave and time consumer to the wave 3 which is impulsive wave and little time consumer,