It's up to you to define what constitutes a breakout. You can do this based on a visual cue from a chart or simply using a fixed value. Whatever floats your boat really, but I prefer the latter. You can get cute with that, but once the trade is initiated, the trail stop increments, or horizontal levels really, should be symmetrical, and stops should trail at each level (not tick) to allow for price variances. None of this last bar low, doji, shooting star crap, which is asymmetrical. That's child's play, and you can't play in the big leagues without measurability.