[JL] 3-Color Renko High-Low Alert

I am playing Renko and made this script.

- Ignore ATR mode because it will repaint. Instead setting the boxsize and SL index by wathching ATR Labels
- pipmode is because I always trading forex. Normally I use pips. If you are trading others just set it to false.
- Set up box size and SL index based on ATR Labels