While many investors will watch the big earnings this week from names like Tesla (TSLA) and Netflix (NFLX), Kevin Green points to other companies you'll want to watch. He highlights Coca-Cola (KO) and Zions Bancorporation (ZION) for signals of consumer health and confidence, along with Lockheed Martin (LMT) for a better sense of defense spending's outlook. As crude oil prices continue to plummet, Kevin explains how it can flash warnings signs of an economic slowdown even as natural gas prices soar.