The markets are floating flat to lower today after a solid Non Farm Payrolls rally on Friday. There is a little worry in the market over Greece. Europe is trying to avoid a default that would shake the markets across the globe and a deal needs to supposedly be struck within the next 24 hours. On the volume front, things are very quiet following the Giants winning the Superbowl. This is known as a classic market hangover. The SPDR S&P 500 ETF (NYSEARCA:SPY) is trading at $134.24, -0.33 (-0.25%).This video looks at key stocks and answers questions based on master support and resistance levels. Some of the stocks analyzed are Dell Inc. (NASDAQ:DELL) and 3M Company (NYSE:MMM). In addition, Caterpillar Inc. (NYSE:CAT) and Hewlett-Packard Company (NYSE:HPQ) are also analyzed. Less