The zigzags are labeled W and Y (and Z, if a triple).
ZIGZAGS (5-3-5)
A single zigzag in a bull market is a simple three-wave declining pattern labeled A-B-C and subdividing 5-3-5. The top of wave B is noticeably lower than the start of wave A, as illustrated in Figures 11 and 12.
Occasionally zigzags will occur twice, or at most, three times in succession, particularly when the first zigzag falls short of a normal target. In these cases, each zigzag is separated by an intervening “three” (labeled X), producing what is called a double zigzag (see Figure 13) or triple zigzag. The zigzags are labeled W and Y (and Z, if a triple).