Delta_oscillator

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

//|                                             Delta_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 "Delta oscillator"

#property indicator_separate_window

#property indicator_buffers 4

#property indicator_plots   1

//--- plot Delta

#property indicator_label1  "Delta Osc"

#property indicator_type1   DRAW_COLOR_HISTOGRAM

#property indicator_color1  clrGreen,clrRed,clrDarkGray

#property indicator_style1  STYLE_SOLID

#property indicator_width1  2

//--- indicator buffers

double         BufferOSC[];

double         BufferColors[];

double         BufferPrice[];

double         BufferDelta[];

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

//| Custom indicator initialization function                         |

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

int OnInit()

  {

//--- indicator buffers mapping

   SetIndexBuffer(0,BufferOSC,INDICATOR_DATA);

   SetIndexBuffer(1,BufferColors,INDICATOR_COLOR_INDEX);

   SetIndexBuffer(2,BufferPrice,INDICATOR_CALCULATIONS);

   SetIndexBuffer(3,BufferDelta,INDICATOR_CALCULATIONS);

//--- setting indicator parameters

   IndicatorSetString(INDICATOR_SHORTNAME,"Delta Oscillator");

   IndicatorSetInteger(INDICATOR_DIGITS,Digits());

//--- setting buffer arrays as timeseries

   ArraySetAsSeries(BufferOSC,true);

   ArraySetAsSeries(BufferColors,true);

   ArraySetAsSeries(BufferPrice,true);

   ArraySetAsSeries(BufferDelta,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(open,true);

   ArraySetAsSeries(high,true);

   ArraySetAsSeries(low,true);

   ArraySetAsSeries(close,true);

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

   if(rates_total<4) return 0;

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

   int limit=rates_total-prev_calculated;

   if(limit>1)

     {

      limit=rates_total-2;

      ArrayInitialize(BufferOSC,EMPTY_VALUE);

      ArrayInitialize(BufferPrice,0);

      ArrayInitialize(BufferDelta,0);

     }



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

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

     {

      BufferPrice[i]=(open[i]+high[i]+low[i]+close[i])/4.0;

      if(BufferPrice[i]>0 && BufferPrice[i+1]>0)

         BufferDelta[i]=BufferPrice[i]+log10(BufferPrice[i+1]/BufferPrice[i]);

      BufferOSC[i]=(BufferDelta[i]!=0 ? BufferPrice[i]-BufferDelta[i] : EMPTY_VALUE);

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

     }

   

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

   return(rates_total);

  }

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