Here is a diagonal with wave 3 in it a diagonal itself.
It is located here:
Pretty sure that circled part is an impulse.
All other rules are complied: wave 3 is not the shortest, wave 2 does not cross beginning of wave 1. But wave 3 is a diagonal.
There are intersections between waves 1 and 4.
It is located here:
All other rules are complied: wave 3 is not the shortest, wave 2 does not cross beginning of wave 1. But wave 3 is a diagonal.
There are intersections between waves 1 and 4.