Hello, I have this indicator (please see code below) Nadaraya Watson Indicator and on most daily charts it plots just fine, but some charts on Daily time frame, box pops up with Error Message:

” Error in the indicator: Nadaraya Watson
A positive integer field is expected with $a”

Daily Units I have set to 1k.  For example ticker METHUSDXXXX , this indicator is refusing to draw, but other futures and stocks it draws just fine .

As well this indicator Does Not Draw at all on ALL Weekly charts, even if units amount is set to 100 units.

Any idea how to fix this? I am using the stable version of Prorealtime end of day data v11.1

This is the code:

//Nadaraya-Watson Envelope
defparam drawonlastbaronly = true
length = 500//Window Size
hh = 8 //Bandwidth
mult = .3
src = Close
n = barindex
k = 2
if IsLastBarUpdate then
y2 = 0
sume = 0
for i = 0 to length-1
sum = 0
sumw = 0
for j = 0 to length-1
w = EXP(-pow(i-j,2)/(hh*hh*2))
sum = sum+src[j]*w
sumw = sumw+w
next
y2 = sum/sumw
sume = sume+abs(src[i] – y2)
$a[barindex-i]=y2
//DRAWPOINT(barindex-i, y2, 1)
next
mae = sume/(length*mult)
for i=0 to length-1
DRAWPOINT(barindex-i, $a[barindex-i]-mae, 2) coloured(0,255,0,100)
DRAWPOINT(barindex-i, $a[barindex-i]+mae, 2) coloured(255,0,0,100)
//if close[barindex-i] > ($a[barindex-i]+mae) then // and src[1]<y2[1]+mae then
//drawarrowdown(barindex-i,high) coloured(“red”)
//endif
//if close[barindex-i] < ($a[barindex-i]-mae) then //and src[1]>y2[1]-mae then
//drawarrowup(barindex-i,low) coloured(“green”)
//endif
next
/*drawpoint(barindex,y2,1)
drawpoint(barindex,y2+mae,1)
drawpoint(barindex,y2-mae,1)*/
Y2High=$a[barindex]+mae
Y2Low=$a[barindex]-mae

endif
return y2,y2+mae,y2-mae