Alcoa Corp (NYSE:AA) stock is down 3.8% to trade at $38.78 at last check, looking to log its third-straight daily loss after its early July rally lost steam at the $43 mark. So far this week, AA has shed 8.3% and its pulling back towards its +10% year-over-year level. There's a silver lining, however, as this drip puts Alcoa stock within a chip-shot of a historically bullish trendline.Per Schaeffer's Senior Quantitative Analyst Rocky White, the aluminum stock's drawdown security put it within one standard d ...