This chart could be a screaming sell sign that bodes ill for market

Looking at a 'megaphone top,' or what could be a screaming sell sign. With CNBC's Melissa Lee and the Futures Now traders, Tim Seymour, Brian Kelly, Steve Grasso and Guy Adami.

Fast Money,CNBC,business news,finance stock,stock market,news channel,news station,breaking news,us news,world news,cable,cable news,finance news,money,money tips,financial news,stock market news,stocks,