Even when buyers are merely marking time, the TrumpSanta rally appears able to eke out at least a small gain. That was the case on Monday, when the Dow Industrials finished the session 40 points higher on comatose price action that barely generated a sine wave.  The close was smack-dab in the middle of the intraday range, implying that bulls were simply waiting for the right inspiration to seize the moment.  That could come on Tuesday with the release of weekly sales figures for chain stores, discounters and department stores. Ordinarily, this data from Redbook is greeted with a shrug. However, if stores across the U.S. have been as crowded as the ones here in Boulder, it could provide a bullish jolt to stocks. Investors don’t need much to get their juices flowing these days, so don’t be surprised if even slightly elevated retail numbers send the Dow up 100 points or more.