возможно расчет машки идет по другому wpr.

//+------------------------------------------------------------------+
//|                                                       TwoWPR.mq4 |
//|                                              Copyright 2022, AM2 |
//|                                     https://www.forexsystems.biz |
//+------------------------------------------------------------------+
#property copyright "Copyright 2022, AM2"
#property link      "https://www.forexsystems.biz"
#property version   "1.00"
#property strict
#property indicator_separate_window

#property indicator_buffers 2

extern int WPR = 120;
extern int Count = 5;


double wpr1[];
double wpr2[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   SetIndexStyle(0,DRAW_LINE,0,2,Aqua);
   SetIndexStyle(1,DRAW_LINE,0,2,Red);
   SetIndexBuffer(0,wpr1);
   SetIndexBuffer(1,wpr2);
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
//---
   for(int i = 111; i>=0; i--)
     {
      wpr1[i] = (iWPR(Symbol(),Period(),WPR,i)+50.0)*2;
      wpr2[i] = 100-(iWPR(Symbol(),Period(),WPR*Count,i)+100.0)*2;
     }
     
//--- return value of prev_calculated for next call
   return(rates_total);
  }
//+------------------------------------------------------------------+