DMI_Difference

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

//|                                               DMI_Difference.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 "DMI Difference oscillator"

#property indicator_separate_window

#property indicator_buffers 3

#property indicator_plots   1

//--- plot DDMI

#property indicator_label1  "DDMI"

#property indicator_type1   DRAW_COLOR_LINE

#property indicator_color1  clrDodgerBlue,clrOrangeRed,clrDarkGray

#property indicator_style1  STYLE_SOLID

#property indicator_width1  2

//--- input parameters

input uint     InpPeriod   =  14;   // ADX period

//--- indicator buffers

double         BufferDDMI[];

double         BufferColors[];

double         BufferPDI[];

double         BufferMDI[];

//--- global variables

int            period;

int            handle_adx;

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

//| Custom indicator initialization function                         |

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

int OnInit()

  {

//--- set global variables

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

//--- indicator buffers mapping

   SetIndexBuffer(0,BufferDDMI,INDICATOR_DATA);

   SetIndexBuffer(1,BufferColors,INDICATOR_COLOR_INDEX);

   SetIndexBuffer(2,BufferPDI,INDICATOR_CALCULATIONS);

   SetIndexBuffer(3,BufferMDI,INDICATOR_CALCULATIONS);

//--- setting indicator parameters

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

   IndicatorSetInteger(INDICATOR_DIGITS,Digits());

//--- setting buffer arrays as timeseries

   ArraySetAsSeries(BufferDDMI,true);

   ArraySetAsSeries(BufferColors,true);

   ArraySetAsSeries(BufferPDI,true);

   ArraySetAsSeries(BufferMDI,true);

//--- create MA's handles

   ResetLastError();

   handle_adx=iADX(NULL,PERIOD_CURRENT,period);

   if(handle_adx==INVALID_HANDLE)

     {

      Print("The iADX(",(string)period,") object was not created: Error ",GetLastError());

      return INIT_FAILED;

     }

//---

   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 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(BufferDDMI,EMPTY_VALUE);

      ArrayInitialize(BufferPDI,0);

      ArrayInitialize(BufferMDI,0);

     }

//--- >43>B>2:0 40==KE

   int count=(limit>1 ? rates_total : 1),copied=0;

   copied=CopyBuffer(handle_adx,PLUSDI_LINE,0,count,BufferPDI);

   if(copied!=count) return 0;

   copied=CopyBuffer(handle_adx,MINUSDI_LINE,0,count,BufferMDI);

   if(copied!=count) return 0;



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

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

     {

      BufferDDMI[i]=BufferPDI[i]-BufferMDI[i];

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

     }



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

   return(rates_total);

  }

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