This indicator colors the candle body based on whether it closed as an Inside Bar (IB) or an Outside Bar (OB).
Inside and outside bars can be powerful triggers to enter or exit trades from, when price breaks above or below the candle.
The coloring of only the body and not the border of the candle makes it possible to still know whether the candle was...
Most of the engulfing indicators i tried seemed to only look at the candle bodies which i didnt like. This one takes into account the highs and lows as well. You get less signals but each one seem to be more reliable.