SPX Wave 3 — how long can it continue?

It's been a wild ride for SPX since the beginning of October. How long can this Wave v of 3 continue? One guideline says .618 of the net travel of Waves 1 through 3. That would be about 3254. Yikes!

But the upper channel line doesn't disagree...
Chart PatternsTechnical IndicatorsWave Analysis

Declinazione di responsabilità