Reversion Index

• 12/17/2025 at 9:59 AM #254594
  regus

  Please can someone convert this indicator from Tradingview.

  // TASC Issue: January 2026
  // Article: Identifying Peaks And Valleys In Ranging Markets
  // The Reversion Index
  // Article By: John F. Ehlers
  // Language: TradingView’s Pine Script® v6
  // Provided By: PineCoders, for tradingview.com

  //@version=6
  indicator(“TASC 2026.01 The Reversion Index”, “RI”, overlay = false)

  //#region Inputs

  int length = input.int(20, title = “RI Length”, tooltip = “Normalization Length of Data.”)
  riSmooth = 8
  trSmooth = 4

  //#endregion

  //#region Functions

  // Reversion Index
  reversionIndex (int length) =>
  float d = close – close[1]
  float ds = math.sum(d, length)
  float ads = math.sum(math.abs(d), length)
  float ratio = ads != 0.0 ? ds / ads : 0.0
  ratio

  // Super Smoother Filter
  superSmoother(float Series, float Period) =>
  var float ALPHA = math.pi * math.sqrt(2.0) / Period
  var float BETA = math.exp(-ALPHA )
  var float COEF2 = -math.pow(BETA, 2)
  var float COEF1 = math.cos( ALPHA ) * 2.0 * BETA
  var float COEF0 = 1.0 – COEF1 – COEF2
  float sma2 = math.avg(Series, nz(Series[1], Series))
  float smooth = na, smooth := COEF0 * sma2 +
  COEF1 * nz(smooth[1]) +
  COEF2 * nz(smooth[2])

  //#endregion

  //#region Calculations

  float ri = reversionIndex(length)
  float sm = superSmoother(ri, riSmooth)
  float tr = superSmoother(ri, trSmooth)

  //#endregion

  //#region Display

  hline(0)
  plot(sm, “Smooth”, color.red)
  plot(tr, “Trigger”, color.blue)

  //#endregion

  

  regus

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  12/17/2025 at 12:51 PM #254608
  Iván

  Here it is:

  //-------------------------------------------------// //PRC_TASC Issue: January 2026 // Article: Identifying Peaks And Valleys In Ranging Markets - The Reversion Index // Article By: John F. Ehlers //version = 0 //17.12.25 //Iván González @ www.prorealcode.com //Sharing ProRealTime knowledge //-------------------------------------------------// // --- Parameters --- //-------------------------------------------------// length = 20 riSmooth = 8 trSmooth = 4 //-------------------------------------------------// // --- Reversion Index Calculation --- //-------------------------------------------------// // Logic: Ratio of net price change to total absolute price change priceChange = Close - Close[1] sumChange = Summation[length](priceChange) sumAbsChange = Summation[length](ABS(priceChange)) // ratio calculation with division by zero protection ri = 0 IF sumAbsChange <> 0 THEN ri = sumChange / sumAbsChange ENDIF //-------------------------------------------------// // --- Super Smoother Filter Logic --- //-------------------------------------------------// // 1. Calculation for "Smooth" (sm) using riSmooth period //-------------------------------------------------// PIValue = 3.14159 // Alpha and Beta calculations Alpha1 = (PIValue * SQRT(2)) / riSmooth Beta1 = EXP(-Alpha1) // Coefficients Coef21 = -1 * SQUARE(Beta1) // Convert Radians to Degrees AlphaDeg1 = Alpha1 * 180 / PIValue Coef11 = COS(AlphaDeg1) * 2 * Beta1 Coef01 = 1 - Coef11 - Coef21 // Filter calculation // sma2 is the average of current and previous input sma21 = (ri + ri[1]) / 2 IF BarIndex < length + 2 THEN sm = 0 ELSE // Recursive calculation: uses previous values of sm sm = (Coef01 * sma21) + (Coef11 * sm[1]) + (Coef21 * sm[2]) ENDIF //-------------------------------------------------// // 2. Calculation for "Trigger" (tr) using trSmooth period //-------------------------------------------------// Alpha2 = (PIValue * SQRT(2)) / trSmooth Beta2 = EXP(-Alpha2) Coef22 = -1 * SQUARE(Beta2) // Convert Radians to Degrees AlphaDeg2 = Alpha2 * 180 / PIValue Coef12 = COS(AlphaDeg2) * 2 * Beta2 Coef02 = 1 - Coef12 - Coef22 sma22 = (ri + ri[1]) / 2 IF BarIndex < length + 2 THEN mytr = 0 ELSE mytr = (Coef02 * sma22) + (Coef12 * mytr[1]) + (Coef22 * mytr[2]) ENDIF //-------------------------------------------------// RETURN 0 AS "Zero Level", sm COLOURED(255, 0, 0) AS "Smooth", mytr COLOURED(0, 0, 255) AS "Trigger"

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  //-------------------------------------------------// //PRC_TASC Issue: January 2026 // Article: Identifying Peaks And Valleys In Ranging Markets - The Reversion Index // Article By: John F. Ehlers //version = 0 //17.12.25 //Iván González @ www.prorealcode.com //Sharing ProRealTime knowledge //-------------------------------------------------// // --- Parameters --- //-------------------------------------------------// length = 20 riSmooth = 8 trSmooth = 4 //-------------------------------------------------// // --- Reversion Index Calculation --- //-------------------------------------------------// // Logic: Ratio of net price change to total absolute price change priceChange = Close - Close[1] sumChange = Summation[length](priceChange) sumAbsChange = Summation[length](ABS(priceChange))   // ratio calculation with division by zero protection ri = 0 IF sumAbsChange <> 0 THEN    ri = sumChange / sumAbsChange ENDIF //-------------------------------------------------// // --- Super Smoother Filter Logic --- //-------------------------------------------------// // 1. Calculation for "Smooth" (sm) using riSmooth period //-------------------------------------------------// PIValue = 3.14159 // Alpha and Beta calculations Alpha1 = (PIValue * SQRT(2)) / riSmooth Beta1 = EXP(-Alpha1) // Coefficients Coef21 = -1 * SQUARE(Beta1) // Convert Radians to Degrees AlphaDeg1 = Alpha1 * 180 / PIValue Coef11 = COS(AlphaDeg1) * 2 * Beta1 Coef01 = 1 - Coef11 - Coef21   // Filter calculation // sma2 is the average of current and previous input sma21 = (ri + ri[1]) / 2   IF BarIndex < length + 2 THEN    sm = 0 ELSE    // Recursive calculation: uses previous values of sm    sm = (Coef01 * sma21) + (Coef11 * sm[1]) + (Coef21 * sm[2]) ENDIF //-------------------------------------------------// // 2. Calculation for "Trigger" (tr) using trSmooth period //-------------------------------------------------// Alpha2 = (PIValue * SQRT(2)) / trSmooth Beta2 = EXP(-Alpha2)   Coef22 = -1 * SQUARE(Beta2) // Convert Radians to Degrees AlphaDeg2 = Alpha2 * 180 / PIValue Coef12 = COS(AlphaDeg2) * 2 * Beta2 Coef02 = 1 - Coef12 - Coef22   sma22 = (ri + ri[1]) / 2   IF BarIndex < length + 2 THEN    mytr = 0 ELSE    mytr = (Coef02 * sma22) + (Coef12 * mytr[1]) + (Coef22 * mytr[2]) ENDIF   //-------------------------------------------------// RETURN 0 AS "Zero Level", sm COLOURED(255, 0, 0) AS "Smooth", mytr COLOURED(0, 0, 255) AS "Trigger"

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  regus

  

  Iván

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