This idea originally by ChartArt on January 14, 2015 as Strategy, and I modify it to become as Signals on 26 July 2019.
This signals uses a modified RSI to sell when the RSI increases over the value of 60 (or to buy when the value falls below 40), with the classic Bollinger Bands strategy to sell when the price is above the upper Bollinger Band (and to buy when this value is below the lower band).
This signals only triggers when both the RSI and the Bollinger Bands indicators are at the same time in a overbought or oversold condition.