I needed to see screenshots and as you had not posted any link I found this one OBV Oscillator

I see some code was appended at a later moment. Can you provide a link to that code and pic, so that I can find details about its purpose?

There you go:

// OBV Oscillator2
//
// On Balance Volume Oscillator
//
// https://www.tradingview.com/script/Ox9gyUFA-Indicator-OBV-Oscillator/
// https://www.prorealcode.com/topic/conversion-of-pine-script-obv-osc-0-1/
//
// It makes easier to detect DIVERGENCES
//
// Periods  = 20
// Periods2 = 14
Periods     = max(1,min(999,Periods))
Periods2    = max(1,min(999,Periods2))
//
MyOBV       = OBV(close)
ma1         = 0
IF BarIndex > max(Periods,Periods2) THEN
   Sma        = Average[Periods,0](MyOBV)
   Diff       = MyOBV - Sma
   // --- added later:
   //    (https://www.prorealcode.com/topic/conversion-of-pine-script-obv-osc-0-1/#post-177572)
   Sma         = Average[Periods,0](MyOBV)
   Diff        = MyOBV - Sma
   //////////////////////////////////
   ONCE wmaPERC = 1 / Periods2
   ONCE maP = max(1,round(exp(0.5*log(Periods2))))
   //
   ma1   = (Diff * wmaPERC) + (ma1[1] * (1 - wmaPERC))     //Wilder Average 1
   //ma1 = ((ma1[1] * (Periods2 - 1)) + Diff) / Periods2   //Wilder Average 2
   //
   ma2 = average[maP,0](ma1)
   r = 255                          //Orange
   g = 100
   b = 10
   IF ma1 > ma2 THEN
      r = 20                        //Cyan
      g = 150
      b = 255
   ENDIF
   ma3 = ma1 * exp(0.15*log(Periods2))
   //DrawText("•",BarIndex,Ma3,Dialog,Bold,10) coloured(r,g,b,255)
   // --- end additional code
ENDIF
RETURN Diff AS "Difference",ma3 AS "ma3"