Key TakeawaysLululemon Athletica shares moved higher in premarket trading Friday after the activewear retailer reported higher-than-expected profit and outlined efforts to accelerate the introduction of new products, offsetting weak sales and a cut to its full-year outlook.The stock's premarket move sets the stage for a potential retest of the top trendline of a descending channel and the 50-day moving average.Investors should monitor post-earnings price levels on the Lululemon chart at $272,$293, $335. an ...