Quantitative_Return_Oscillator

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

//|                               Quantitative_Return_Oscillator.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 "Quantitative Return Oscillator"

#property indicator_separate_window

#property indicator_buffers 2

#property indicator_plots   1

//--- plot QRO

#property indicator_label1  "QRO"

#property indicator_type1   DRAW_COLOR_HISTOGRAM

#property indicator_color1  clrLimeGreen,clrRed,clrDarkGray

#property indicator_style1  STYLE_SOLID

#property indicator_width1  8

//--- input parameters

input uint     InpPeriod      =  5;       // Period

input double   InpMultiplier  =  100.0;   // Multiplier

//--- indicator buffers

double         BufferQRO[];

double         BufferColors[];

//--- global variables

double         multiplier;

int            period;

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

//| Custom indicator initialization function                         |

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

int OnInit()

  {

//--- set global variables

   period=int(InpPeriod<2 ? 2 : InpPeriod);

   multiplier=InpMultiplier;

//--- indicator buffers mapping

   SetIndexBuffer(0,BufferQRO,INDICATOR_DATA);

   SetIndexBuffer(1,BufferColors,INDICATOR_COLOR_INDEX);

//--- setting indicator parameters

   IndicatorSetString(INDICATOR_SHORTNAME,"Quantitative Return Oscillator ("+(string)period+","+DoubleToString(multiplier,1)+")");

   IndicatorSetInteger(INDICATOR_DIGITS,Digits());

//--- setting buffer arrays as timeseries

   ArraySetAsSeries(BufferQRO,true);

   ArraySetAsSeries(BufferColors,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[])

  {

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

   ArraySetAsSeries(close,true);

//--- @>25@:0 :>;8G5AB20 4>ABC?=KE 10@>2

   if(rates_total<fmax(period,4)) return 0;

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

   int limit=rates_total-prev_calculated;

   if(limit>1)

     {

      limit=rates_total-period-2;

      ArrayInitialize(BufferQRO,EMPTY_VALUE);

      ArrayInitialize(BufferColors,2);

     }



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

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

     {

      BufferQRO[i]=(close[i+period-1]!=0 ? multiplier*log(close[i]/close[i+period-1]) : 0);

      BufferColors[i]=(BufferQRO[i]>BufferQRO[i+1] ? 0 : BufferQRO[i]<BufferQRO[i+1] ? 1 : 2);

     }



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

   return(rates_total);

  }

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