Key TakeawaysArm shares plunged ahead of Thursday’s opening bell after the British chip designer’s light profit guidance overshadowed quarterly results that came in above expectations.Monitor if bulls can successfully defend an uptrend line that stretches back to the October 2023 low. A successful hold of the indicator could see a resumption of the stock’s longer-term uptrend, while a breakdown may signal a change in trend direction.Upon a close below the uptrend line, Arm shares could find chart support at ...