Alcoa Corp (NYSE:AA) stock is down 3.1% to trade at $36.41 at last check, looking to snap a four-day win streak as it pulls back from an April 29, 52-week high of $38.20. The 40-day moving average and $34 region contained this recent pullback, however, and the shares now look ready to bounce, according to a historically bullish signal.Specifically, the equity's recent peak comes amid historically low implied volatility (IV), which has been a bullish combination for Alcoa stock in the past. According to data ...