March S&P 500 E-Mini futures (ESH24)are up +0.25%, and March Nasdaq 100 E-Mini futures (NQH24) are up +0.37% this morning as investors looked ahead to further testimony from Federal Reserve Chair Jerome Powell as well as a policy verdict from the European Central Bank while also gearing up for a fresh batch of U.S. economic data. In Wednesday’s trading session, Wall Street’s major averages ended higher. DexCom Inc (DXCM) climbed over +9% and was the top percentage gainer on the S&P 500 after the U.S. FDA approved the company’s Stelo Glucose Biosensor System, the first over-the-counter continuo…