Agricultural chemical stock Mosaic Co (NYSE:MOS) has been climbing since the start of the year, up 18% so far. The equity could be due for a short-term pullback, however, as its recent rally was just shut down by a historically bearish trendline.Per Schaeffer's Senior Quantitative Analyst Rocky White, MOS is within 0.75 of the 126-day moving average's 20-day average true range (ATR) after remaining below it 80% of the time throughout the past two weeks and 80% of the last 42 trading sessions. This signal ha ...