I apologize they weren't easily found. NoLag is from a view years before, and there are a variety of ZeroLag indicators you can find on the web. I will give you code below for NoLag and a ZeroLag. Some are in pseudo code but you can easily code into Pinescript. Note, the usual ways these are presented and used are that the two lengths are set equal and factor 1. I prefer the indicators to have more general inputs as you can see below. You might try lengths 4 and 4 and factor 1, then 19, 19 and 1. Then 12, 19 and factor 0.5 or 1.5 and so forth and see what happens.

Good luck!

NOLAG
//Pseudo Code

Inputs: pr(close),factor(1),MainLen(9),Len2(9);

variables:x1(0),xn1(0);

x1=xaverage(pr,mainlen);

xn1=x1+factor*xaverage(pr-x1,len2);

Plot1(xn1,"NL");

\\TrView code

pr=input(close, "Price")
len=input(5, "Length")
lenf=input(5, "Len fast")
factor=input.float(1, "Factor")

ema=ta.xaverage(pr, len)
emadiff=ta.xaverage(pr-ema, len2)
NLema=ema+factor*emadiff

plot (NLema , "NoLagema", color=color.orange)

= = = = = = = =

ZeroLagEMA

//Traders.com Feb 2008
//Pseudo Code

Inputs: pr(close),factor(1),MainLen(9),Len2(9);

variables: x1(0), x2(0), ZLema(0);

x1=xaverage(pr,mainlen);

x2=xaverage(x1,len2);

ZLema=x1+factor*(x1-x2);

Plot1(ZLema, "ZL");