This is what I call the advanced RSI. It employs Bollinger bands on the RSI itself, in order to better highlight extremes that are still within the typical 30-70 range on.
You'll notice some background highlights. These are simply to mark the extremes.
Orange marks your standard overbought, Red marks oversold.
Fuchsia marks an RSI outside the lower deviation on the Bollinger Bands. Green marks an RSI outside the upper deviation on the Bollinger bands.
Typically while in an uptrend, the RSI dropping below the lower deviation indicates an entry point (fuchsia). The same applies for a downtrend with the RSI rising above the upper deviation (green).
You can look at the overlap in colors as even stronger indications because on a more rare occasion you will have the RSI outside the upper/lower deviation as well as being outside the typical oversold/overbought levels.
Any feedback is welcome! I try to employ contrasting colors, but they may not make sense to you so change them as you please - they are simply markers.