Difference

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

//|                                                   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 indicator_separate_window

#property indicator_buffers 3

#property indicator_plots   1

//--- plot Difference

#property indicator_label1  "Difference"

#property indicator_type1   DRAW_COLOR_HISTOGRAM

#property indicator_color1  clrLimeGreen,clrOrangeRed

#property indicator_style1  STYLE_SOLID

#property indicator_width1  2

//--- enums

enum ENUM_METHOD

  {

   METHOD_HIGH_LOW,     // High/Low

   METHOD_OPEN_CLOSE    // Open/Close

  };

//--- input parameters

input uint        InpPeriod   =  10;               // Period

input ENUM_METHOD InpMethod   =  METHOD_HIGH_LOW;  // Calculation method

//--- indicator buffers

double         BufferDifference[];

double         BufferColors[];

double         BufferData[];

//--- global variables

int            period_ma;

//--- includes

#include <MovingAverages.mqh>

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

//| Custom indicator initialization function                         |

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

int OnInit()

  {

//--- setting global variables

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

   string short_name="Difference("+(string)period_ma+")";

//--- indicator buffers mapping

   SetIndexBuffer(0,BufferDifference,INDICATOR_DATA);

   SetIndexBuffer(1,BufferColors,INDICATOR_COLOR_INDEX);

   SetIndexBuffer(2,BufferData,INDICATOR_CALCULATIONS);

   PlotIndexSetString(0,PLOT_LABEL,short_name);

//--- settings indicators parameters

   IndicatorSetInteger(INDICATOR_DIGITS,2);

   IndicatorSetString(INDICATOR_SHORTNAME,short_name);

//--- setting buffer arrays as timeseries

   ArraySetAsSeries(BufferDifference,true);

   ArraySetAsSeries(BufferColors,true);

   ArraySetAsSeries(BufferData,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 :>;8G5AB2> 10@>2 4;O @0AGQB0

   if(rates_total<period_ma || Point()==0) return 0;

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

   int limit=rates_total-prev_calculated;

   if(limit>1)

     {

      limit=rates_total-1;

      ArrayInitialize(BufferDifference,EMPTY_VALUE);

      ArrayInitialize(BufferData,EMPTY_VALUE);

      ArrayInitialize(BufferColors,0);

     }

//--- #AB0=>2:0 8=45:A0F88 <0AA82>2 :0: B09<A5@89

   ArraySetAsSeries(open,true);

   ArraySetAsSeries(high,true);

   ArraySetAsSeries(low,true);

   ArraySetAsSeries(close,true);

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

   for(int i=limit; i>=0; i--)

      BufferData[i]=(InpMethod==METHOD_HIGH_LOW ? high[i]-low[i] : close[i]-open[i])/Point();

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

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

   SimpleMAOnBuffer(rates_total,prev_calculated,0,period_ma,BufferData,BufferDifference);

   for(int i=limit-1; i>=0; i--)

     {

      if(BufferDifference[i]<BufferDifference[i+1])

         BufferColors[i]=1;

      else

         BufferColors[i]=0;

     }

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

   return(rates_total);

  }

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