These are the charts to worry about. The current bull market in the S&P 500 and the Dow Jones has been going on for some time. But could it be "getting old"? Are there any potential risks or headwinds ahead for the stock markets? If a correction is likely coming, what is the average perecentage drop we could expect for a correction? We speak with Manuel Blay of the Dow Theory and look at the charts. Video by Alessio Rastani.
