the difference between ending diagonal and corrective triangle as both of them contain 33333. A triangle is usually a continuation pattern and occurs in wave B or 4 and sometimes it could appear in wave Y as we of a WXY structure. Ending diagonal is a terminal pattern. Moreover, triangles are contracting and even in a running triangle where wave B goes beyond start of wave A, rest you will see some sort of contraction or consolidation in all types of triangles. In an Ending diagonal, however, you will see each wave advancing and making a new high or low but with lesser momentum and usually the magnitude of each wave would be less than the previous one Update idea