The S&P 500 index must hit the October high to avoid a 10 percent correction, and if the market does correct, the VIX volatility index could fall below 20 percent, Chris Zwermann from Zwermann Financial told CNBC Wednesday.

“We had a high of 1,101 last time (in the S&P) and now yesterday we reached more or less 1,095,” he said, adding that “the question is 'are we building here some kind of shoulder-head-shoulder (pattern).'”