Someone in Tempur-Sealy heavily bought the stock just after price felt dramatically.

Tompson Scott L. is the CEO and the president of the firm. Within a few days, the stock's price felt from $68 to almost $50. That's a -26.4% performance. Usually, markets are going back to the mean after a strong move but it would be dangerous to buy the stock only because price is lower. 

The good new is that we have a really good reason to buy it now : the insider activity. In fact, insiders are the most informed people inside a comapny. Also, they are aware of new things before the entire market. So immitating them can be a very good strategy.

The green ellipse represents the CEO's buying order. It had been executed at $51.19 for more than 19k shares. That's a huge trade and if Tompson Scott is heavily buying, I guess that he has a really strong information or at least a excellent reason.