DraftKings (DKNG) has been choppy since its Mar. 27 two-year high of $49.57, with 2.8% post-earnings bear gap on May 3 not helping matters. Last seen down 3.3% to trade at $42.42 and on track for a fourth loss in the last five days, the silver lining is that this pullback has the stock near a historically bullish trendline.DKNG has come within one standard deviation of its 80-day moving average, defined for this study as having traded north of this trendline 80% of the time in the past two months, and in ei ...