Laguerre RSI is based on John EHLERS' Laguerre Filter to avoid the noise of RSI.

Change the alpha coefficient to increase/decrease lag and smoothness.
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Buy when Laguerre RSI crosses upwards above 20.
Sell when Laguerre RSI crosses down below 80.

While the indicator runs flat above 80, an uptrend is strong.
While the indicator runs flat below the 20 level, it means that a downtrend is strong.