The formerly red-hot Nasdaq-100 has gone nowhere for more than two months as shares of some of its biggest constituents, including Nvidia Corp., Broadcom Inc. and Apple Inc., have struggled. That was the case again on Tuesday. But there could be better days ahead, with the index NDX on Monday finally flashing a bullish technical pattern that, according to one strategist, signals that the index could be poised for short-term gains. ...