OPEN-SOURCE SCRIPT

BolligerRS

The system based on finding the resistance and support lines based on Bollinger. every time the Bollinger form new line of support or new line of resistance the system will alert you .
you can change the SD or length of Bollinger to your specific needs
add Dema for seeing the trend
There is MTF system for bollinger but it can repaint so be aware if you use it on TV

I think it a good system , but need some workout on lower time frames to clean up too early signals before there is reversal of trend
p.s
The main script I found it on the data of TV long time ago (so I do not remember the author )