Dollar Tree, Inc. (NASDAQ:DLTR) is trading lower on Thursday.Doubts are piling up about the retailer’s ability to sustain momentum against rivals that appear to be sharpening their pricing and merchandising. • DLTR is encountering selling pressure. Review the technical setup here.Goldman Sachs analyst Kate McShane downgraded Dollar Tree from Buy to Sell, trimming the price target from $133 to $103.Also Read: Tesla Recalls Powerwall 2 Batteries Over Fire HazardAnalyst’s TakeMcShane cut the rating on Dollar T ...