I know I am a massive hypocrite for posting a chart doing such a thing!
However it is extremely important to look at the factors that created the price movements then look at these factors going forward (have we still got QE 4,5,6 lined up, how much more debt can US take on, are negative interest rates on the horizon?). Whilst there is a bias for upward growth in the markets, valuations are reflecting bubbles, bubbles must pop. The economy has not grown or developed enough to reflect the massive market valuations (in my opinion) we have replaced solid jobs and industries with self-service and seasonal bartender style economy.
There is no physical way we can get down to that level as quickly as I have depicted, with all the circuit breakers etc. They would ban short selling (and probably selling) before we got half way.