As it was shown in the Rsi(var) indicator, other Moving Averages can be used for calculation of an RSI indicator. This version is one more step in that direction.
Adding zero lag MA to the RSI calculation as a preferred smoothing method has two things as a result:

IEEE Floating-Point Decoder
Display the actual stored value of a floating-point number (float or double type), with very high precision up to 55 decimal digits. This helps to debug exact value of floating-point numbers for other MQL5 programs.
Zero lag TEMA
This indicator uses TEMA calculation mode in order to make the lag lesser compared to the original Zero lag MA, and that makes this version even faster than the Zero lag DEMA too.
Rsi(var) Zerolag DEMA
Rsi(var) indicator with zero lag DEMA.
Hull trend
Indicator based on Hull Moving Average.