Here is another version of the Jurik’s RSI indicator. Translated from a MT4 indicator as requested in our indicator’s forum for ProRealTime.

The Jurik RSX is a smoothed, non laggy and noise free version of the RSI (Relative Strength Index). Its default length of calculation is 14 periods just like the default RSI indicator.

//PRC_Jurik RSX | indicator
//08.02.2017
//Nicolas @ www.prorealcode.com
//Sharing ProRealTime knowledge

//Len=14

if (f90 = 0.0) then
f90 = 1.0
f0 = 0.0
if (Len-1 >= 5) then 
f88 = Len-1.0
 else 
f88 = 5.0
endif
f8 = 100.0*(Close)
f18 = 3.0 / (Len + 2.0)
f20 = 1.0 - f18
else
if (f88 <= f90) then 
f90 = f88 + 1
else
f90 = f90 + 1
endif
f10 = f8
f8 = 100*Close
v8 = f8 - f10
f28 = f20 * f28 + f18 * v8
f30 = f18 * f28 + f20 * f30
vC = f28 * 1.5 - f30 * 0.5
f38 = f20 * f38 + f18 * vC
f40 = f18 * f38 + f20 * f40
v10 = f38 * 1.5 - f40 * 0.5
f48 = f20 * f48 + f18 * v10
f50 = f18 * f48 + f20 * f50
v14 = f48 * 1.5 - f50 * 0.5
f58 = f20 * f58 + f18 * Abs(v8)
f60 = f18 * f58 + f20 * f60
v18 = f58 * 1.5 - f60 * 0.5
f68 = f20 * f68 + f18 * v18

f70 = f18 * f68 + f20 * f70
v1C = f68 * 1.5 - f70 * 0.5
f78 = f20 * f78 + f18 * v1C
f80 = f18 * f78 + f20 * f80
v20 = f78 * 1.5 - f80 * 0.5

if ((f88 >= f90) and (f8 <> f10)) then 
 f0 = 1.0
endif
if ((f88 = f90) and (f0 = 0.0)) then 
f90 = 0.0
endif
endif


if ((f88 < f90) and (v20 > 0.0000000001)) then 

v4 = (v14 / v20 + 1.0) * 50.0
if (v4 > 100.0) then 
v4 = 100.0
endif
if (v4 < 0.0) then 
v4 = 0.0
endif
 else 
v4 = 50.0
endif

rsx=v4

return rsx coloured(255,0,255) style(line,3) as "Jurik RSX", 30 coloured(100,100,100) style(dottedline), 50 coloured(100,100,100) style(dottedline), 70 coloured(100,100,100) style(dottedline)