PR

ÿþ//+------------------------------------------------------------------+

//|                                                           PR.mq5 |

//|                        Copyright 2018, MetaQuotes Software Corp. |

//|                                                 https://mql5.com |

//+------------------------------------------------------------------+

#property copyright "Copyright 2018, MetaQuotes Software Corp."

#property link      "https://mql5.com"

#property version   "1.00"

#property description "Period Range"

#property indicator_separate_window

#property indicator_buffers 1

#property indicator_plots   1

//--- plot Range

#property indicator_label1  "Range"

#property indicator_type1   DRAW_LINE

#property indicator_color1  clrDodgerBlue

#property indicator_style1  STYLE_SOLID

#property indicator_width1  1

//--- input parameters

input uint     InpPeriod         =  14;      // Period

input bool     InpUseLastPeriod  =  false;   // Use last period

//--- indicator buffers

double         BufferCentral[];

//--- global variables

int            period;

//+------------------------------------------------------------------+

//| Custom indicator initialization function                         |

//+------------------------------------------------------------------+

int OnInit()

  {

//--- set global variables

   period=int(InpPeriod<1 ? 1 : InpPeriod);

//--- indicator buffers mapping

   SetIndexBuffer(0,BufferCentral,INDICATOR_DATA);

//--- setting indicator parameters

   IndicatorSetString(INDICATOR_SHORTNAME,"PR("+(string)period+")");

   IndicatorSetInteger(INDICATOR_DIGITS,Digits());

   IndicatorSetInteger(INDICATOR_LEVELS,1);

   IndicatorSetDouble(INDICATOR_LEVELVALUE,0,100);

//--- setting buffer arrays as timeseries

   ArraySetAsSeries(BufferCentral,true);

//---

   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[])

  {

//--- @>25@:0 =0 <8=8<0;L=>5 :>;85AB2> 10@>2 4;O @0AGQB0

   if(rates_total<period) return 0;

//--- #AB0=>2:0 <0AA82>2 1CD5@>2 :0: B09<A5@89

   ArraySetAsSeries(high,true);

   ArraySetAsSeries(low,true);

   ArraySetAsSeries(close,true);

//--- @>25@:0 8 @0AGQB :>;8G5AB20 ?@>AG8BK205<KE 10@>2

   int limit=rates_total-prev_calculated;

   if(limit>1)

     {

      limit=rates_total-period-2;

      ArrayInitialize(BufferCentral,EMPTY_VALUE);

     }

//---  0AGQB 8=48:0B>@0

   double min=0,max=0;

   for(int i=limit; i>=0 && !IsStopped(); i--)

     {

      if(InpUseLastPeriod)

        {

         int lb=Lowest(period,i);

         int hb=Highest(period,i);

         if(lb==WRONG_VALUE || hb==WRONG_VALUE) return 0;

         min=low[lb];

         max=high[hb];

        }

      else

        {

         int lb=Lowest(period,i+1);

         int hb=Highest(period,i+1);

         if(lb==WRONG_VALUE || hb==WRONG_VALUE) return 0;

         min=low[lb];

         max=high[hb];

        }

      BufferCentral[i]=(min!=max ? 100*(close[i]-min)/(max-min) : EMPTY_VALUE);

     }



//--- return value of prev_calculated for next call

   return(rates_total);

  }

//+------------------------------------------------------------------+

//| >72@0I05B 8=45:A <0:A8<0;L=>3> 7=0G5=8O B09<A5@88 high          |

//+------------------------------------------------------------------+

int Highest(const int count,const int start)

  {

   double array[];

   ArraySetAsSeries(array,true);

   if(CopyHigh(Symbol(),PERIOD_CURRENT,start,count,array)==count)

      return ArrayMaximum(array)+start;

   return WRONG_VALUE;

  }

//+------------------------------------------------------------------+

//| >72@0I05B 8=45:A <8=8<0;L=>3> 7=0G5=8O B09<A5@88 low            |

//+------------------------------------------------------------------+

int Lowest(const int count,const int start)

  {

   double array[];

   ArraySetAsSeries(array,true);

   if(CopyLow(Symbol(),PERIOD_CURRENT,start,count,array)==count)

      return ArrayMinimum(array)+start;

   return WRONG_VALUE;

  }

//+------------------------------------------------------------------+