Here is a simple RSI indicator that has changeable values. It has centerline at 50% along with areas of interest for conservative overbought/oversold along with aggressive overbought/oversold areas. The 70/30 and 85/15 values are built in but you can change them to whatever you want. The upper and lower interest areas are banded with color for ease of viewing.
After watching ChingasX RSI video from Tradingroomap where Chingas added custom lines. I thought I'd give back a little and upload my script that I have been using.
Hope someone finds it useful. :)