This comes from the basics of Technical Analysis and it is a powerful reversal signal especially if it is supported with a triple top resistance rejetion like in this case. Nevertheless caution is needed as in bigger timrframes Gold is in liftoff status. That means that if it doesn't unfold immediately(Wednesday tops) as it should then your stop will be used from the long term buying pressure as a propulsion fuel for the rocket.
Stop at last high and target the golden EMA(at or <$1200). Move stop to break even when Reward=Risk is strongly advised.