this play is a slower mover but it pulled back and turned the resistance into support we are going to trail the trade using the 8SMA and add to it through 73.26
the trading stop (tsp) of (0.5%) in lower panel very well traces the spy, and bollinger band (20) in the upper pannel, together with MA(40, 70), MA70 is equivalent to MA(10) in daily chart (because 7 hours per day).
long spy when price above trailing stop, and sell when drop below tsp, be ware of double top, and false breakout.