The idea is to wait for a pullback (by one of the following candles — preferably the very next candle) to the 50 % mark of the total range of the engulfing candle during certain situations.
I am always on the hunt for interesting finds and saw the trio of brass twist candle sticks in a junk store for next to nothing, I snapped them up as when the projected ended, there was very little money left to accessorize!