CGNX has had a propensity for rising and falling ahead of the major averages. If this correlation continues, the recent breakdown from its countertrend high is a clear warning that the rally so beloved by Main Street investors is on thin ice. Moreover, the recent 5 day average Put/Call ratio has dropped to a six year low, and trader bullish sentiment is now higher than it was at the February peak. Other sentiment figures are flashing similar warning signs.