Markets are still in Bullish mode

After the dreaded Monday of Aug 24 2015, the markets have seemed to recovered almost 100% of its drop. That is a pretty impressive recovery. Since then a lot of people have started speculating that a bear run has started and everyone should short any rally going forward. For this reason I started to look for any similarities in the charts between the present market conditions and the one in 1999 and 2007. If you see the attached chart, one of the indicators I am using is the DPO (Detrended Price Oscillator). Notice how during 1999 and 2007 the oscillator crossed the zero value and stayed below to signal a start of a bear market. The markets crashed after that and the indicator stayed below zero for a long time confirming the bear run. Now in the late 2010 it did cross zero briefly but snapped back up and continued its bull run. It did something very similar recently trapping all the shorts. I will consider the markets bullish unless this DPO indicator crosses the zero line again and stays below it. Let me know what you guys think. Comments are welcome.