Matt, yes that's a nice indicator which can also be used as part of a screen. No idea if anyone else uses Ameritrade's Strategy Desk but if so here's the formula to put into a Level 1 page or plotted on a chart 

    ((Bar[Close,D]-ExpMovingAverage[EMA,Close,9,0,D])/ExpMovingAverage[EMA,Close,9,0,D]) * 100

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