Quote from da-net:
I was under the impression that EW is always a 5-3-5 pattern, and labeled 1,2,3,4,5 followed by a,b,c followed by 1,2,3,4,5 Also when a B wave is in a contracted or Zig Zag pattern it is labeled a,b,c,b.c And usually this contracted or Zig Zag pattern is not able to be labeled properly until it is fully formed.