Corning Incorporated (NYSE:GLW) manufactures and sells specialty glasses, ceramics and related materials throughout the world. The company is best known as the maker of gorilla glass, which is used in many mobile devices. Yesterday, the stock plunged lower by 7.5 percent after reporting earnings. Today, the stock is trying to bounce back a bit, but this is common after a sharp flush. Traders and investors should note that the stock is now trading below its important 50-day moving average. This puts the equity in a weak technical position. The stock should have major chart support around the $29.00 level. This is where the equity broke out in September 2017. Often, prior breakout levels will serve as major chart support when retested.