FB closes (179.40) near established support (175.94) after a sharp dip due to negative reaction to its algorithm change to promote Zuckerberg's new safety and healthiness over profitability mantra. Prior to that, Bollinger band signal shows a bullish expansion; diverging bands, price action follows the upper band, price above the 20 day MA. The Bollinger band bullish expansion is a signal for a long position. The dip in price makes for a good entry point. Facebook earnings are due on 31st January, predictions are positive. STRONG BUY.