Kevin Horner’s Technical Tuesday covers the S&P 500 (SPX), Devon Energy (DVN), and Vulcan Materials (VMC). On the SPX, he thinks a new high this week is “dubious,” but traders may want to “be positioned for comfort” going forward in anticipation of a potential breakdown. DVN moved through a “very important level” of resistance, creating a potential opportunity for a new uptrend. He highlights the 310 level on VMC after the stock broke out of a flag pattern: “this is far more a bullish chart than bearish.”