The TradeBreakOut indicator shows you the distance from the actual price - Close or Maximum/Minimum prices - to the breakthrough of actually set support or resistance levels that were defined by using local maximums and minimums.
If the green line reaches the zero point moving upwards, you can speak of the bullish breakthrough of the local maximum. If the red line reaches the zero point moving downwards, it shows you about the bearish breakthrough of the local minimum. We can say that the more the distance from the zero level, the less the possibility of the breakthrough.
You can download the indicator here: https://www.mql5.com/en/code/1600