i use patterns and figures for spotting a pullback actually, but i confirm that your strategy is also quite effective in spotting it.
triangle is the best pattern for me which help me to identify whether a trend will be reversed, or there will be a continuous flat. i pay attention to the zones of support and resistance, because zones show me what is the level of the price change, where do the price pull back and how to idenify the future breaktrough. as a rule if the price comes to the level frequently, then you might think of the breakthrough and the change of the pullback on a new trend whether uptrend or downtrend.