There are now enough waves to complete a potential triple-zigzag or impulse in ES / SPX since its October low. Please Expanding EDT & Triple Zigzag (1/17/20) for larger-degree details. Chart 1 (triple zigzag) and Chart 2 (impulse) update.
For the triple zigzag tracking count, it's possible that Friday's pullback is wave b-down of wave (z)-up. See Chart 3 for squiggles ( blue: completed impulse; black: completed final zigzag; green: b-down of (z)-up in the final zigzag).