Alphabet (GOOGL) valuation soared past $3T after a recent move to new all-time highs. Kevin Horner points to the $242 line as a key short-term support level and provides technical insights behind the Google parent company's stock. On a 1-year timeframe, he says $225 would act as a potential secondary support level if shares pullback from all-time highs. "There's nothing negative about this chart at all," he adds.