Wave 5 has started at 1.72 and has unfolded yet in a series of nested wave '1's" and "2's" so this pair will drop much further from here.
There is an alternative scenario in which what I have labeled "(4)" is actually a B-wave and the plunge from 2.12 to 1.35 in the years 2007/2008 is wave A. If this scenario is valid then an even deeper fall could follow.