Mike Shorr with @ProsperTradingAcademy focuses on three companies with expansive reach in ecommerce and digital advertising. He notes Maplebear (CART) brushing up against a key resistance level, Roku Inc.'s (ROKU) vulnerability of "outperforming to the downside," and his bullish expectations on Amazon (AMZN). Rick Ducat takes a deeper look at the technical trends his sees in the charts.