Its function is same as appylying the Volatility bands on price. Accordingly to Brown's book, it maybe used to know how overbought or oversold can a market become!
:)
I did read Brown's book recently. She advised how to add Volatiliy Bands on RSI but the formula is in Tradestation format which I don't know so far.
Can anyone know how to add the Volatiliy Bands on RSI for Metastock?
Many thanks!