This indicator simply displays RSI on 4 time frames. You can configure individual RSI lengths as well. The first two RSIs are more visible to prevent clustering. It is possible to define oversold / overbought areas and the script displays the middle line as well.
A couple of use cases:
Comparison of 7, 12, 18 and 24 RSIs on a given time frame
Comparison of 14 RSI on 30m, 1h, 2h and 3h time frame (Default settings)
Please, always use a proper stop loss and risk management.