I'm 90% sure that a giant triangle is drawn on the weekends. First, there are often triangles in a quadruple. Secondly, triangles are certainly after such a swing.

I think that this 2 month wave from 19800 to 5500 is the first wave A of the future triangle.

How long will the correction take? Well, if wave A lasted almost 2 months, then count. For about a year we will dance around ten.