Relative Strength Index w/ 3 Levels & 0 Line Colour (by WJ)

NOTE:
// RSI CODE TAKEN FROM DEFAULT INDICATOR
// I HAVE ONLY MADE SOME ADJUSTMENTS FOR VISUAL AID
// I MADE THIS FOR MY OWN USE BUT HAVE DECIDED TO PUBLISH AND SHARE IN CASE ANYBODY WANTS TO USE IT

This is the normal default built-in RSI indicator which I have added some stuff for visual aid:

• Added middle line (50)
  
• RSI turns green when crossed above 50
  
• RSI turns red when crossed below 50
  

• RSI background turns green and red on crossover candle based on whether RSI just crossed over or below 50 respectively
  
• Alert notification on the crossover candle
  

Versionshinweise:

Shifted comments in code

Versionshinweise:

Fixed 0 Line to 50 Line text

Versionshinweise:

Added SMA in RSI

Versionshinweise:

Changed default settings for SMA on RSI from 227 to 88 as it works better personally

Versionshinweise:

- Changed some default colours and added a 90/10 OB/OS alert

Versionshinweise:

- Issue of Upper and Lower Bands changed limits not affecting RSI colour change should be fixed
- Alerts for mid line crossover and OB/OS levels should be dynamic now

Versionshinweise:

- Changed RSI back to 14 as default value
- Added 2 more bands because I need them :d

Versionshinweise:

- Removed extra bands
- Added MA choices and ability to turn it off

Versionshinweise:

Updated some stuff