A cleaned-up and improved version of the built-in RSI script.
Regular RSI (14 periods, plotted in blue) overlaid on top of longer-term RSI (21 periods, plotted in red)
The overbought and oversold values can be input, but default to 70 and 30, respectively.
Includes a "padding" input, which adds padding to the overbought and oversold values, this provides a range in which a stock is "dangerously overbought/oversold"