A Major Warning From Tom McClellan : "Can This Possibly End Well?"

In one of his tweets yesterday, Tom McClellan, creator of the famous McClellan Oscillator and Summation index used by thousands of traders everywhere as a market timing tool, pointed out something disturbing: the number of shares outstanding of the VXX, the VIX tracking ETN, has soared exponentialy in recent weeks.
VIX futures ETF extremely popular now. Can this possibly end well? pic.twitter.com/TT4SbC8SA1
— Tom McClellan (@McClellanOsc) April 26, 2016