The indicator attempts at automatic detection of support and resistance levels by identifying large swings/pivots in historical price action. These tops and bottoms in price action show where lots of buyers or sellers came into the market and might act as future levels of support or resistance. By default, the code detects the last 3 significant swing highs and the last 3 swing lows. It then places lines on the chart to highlight those levels.
Once you are comfortable with the code base and how the indicator operates, you may wish to expand upon it. One obvious addition to make would be inputs for the "Left Bars", "Right Bars" and "Quick Right" variables so that you can tune the indicator according to your own taste.
Feel free to tweak the code and let everyone know in the comment section if you are able to improvise it.
Happy trading:-)