"... Volatility ($VIX) continues to decline as well, although it has reached a plateau lately (Fig. 4). A declining $VIX is bullish. If $VIX stops declining and begins to rise, then that is normally a sign that the market is about to explode. In the last few years, such explosions have been to the downside (i.e., a low on the volatility chart was a sell signal). However, in the past -- durish bullish market phases -- a low on the volatility chart often preceded a rise by the market. So, what we can safely conclude is that, if a low in volatility appears, the market will generally become quite volatile soon thereafter. The direction of its volatility is less certain.
In summary, then, we remain bullish in line with our technical indicators. If the market begins to pull back now, we'd expect to see sell signals from market breadth, but that alone would not turn us bearish. However, if $VIX rises above 26 or the put-call ratios began to rise, and if $OEX breaks down below its 20-day moving average, then we'd have to abandon the bullish case."