The ebb and flow between Smart Money and Dumb Money can be used in a variety of ways. This piece highlights a Backtest Engine scan that should be of particular interest to shorter-term traders.; Poor internal participation has knocked the S&P 500's McClellan Summation Index below zero for the first time in over a year. That was one of its longest streaks since 1926. The ends of other persistent positive trends have typically led to a resumption of the uptrend.

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