Pain

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

//|                                                         Pain.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 "Pain oscillator"

#property indicator_separate_window

#property indicator_buffers 5

#property indicator_plots   1

//--- plot Pain

#property indicator_label1  "Pain"

#property indicator_type1   DRAW_LINE

#property indicator_color1  clrLightSeaGreen

#property indicator_style1  STYLE_SOLID

#property indicator_width1  1

//--- input parameters

input uint           InpPeriod   =  10;         // Period

input ENUM_MA_METHOD InpMethod   =  MODE_SMA;   // Method

//--- indicator buffers

double         BufferPain[];

double         BufferMAOpen[];

double         BufferMAHigh[];

double         BufferMALow[];

double         BufferMAClose[];

//--- global variables

int            period;

int            handle_mao;

int            handle_mah;

int            handle_mal;

int            handle_mac;

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

//| Custom indicator initialization function                         |

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

int OnInit()

  {

//--- set global variables

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

//--- indicator buffers mapping

   SetIndexBuffer(0,BufferPain,INDICATOR_DATA);

   SetIndexBuffer(1,BufferMAOpen,INDICATOR_CALCULATIONS);

   SetIndexBuffer(2,BufferMAHigh,INDICATOR_CALCULATIONS);

   SetIndexBuffer(3,BufferMALow,INDICATOR_CALCULATIONS);

   SetIndexBuffer(4,BufferMAClose,INDICATOR_CALCULATIONS);

//--- setting indicator parameters

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

   IndicatorSetInteger(INDICATOR_DIGITS,Digits());

//--- setting buffer arrays as timeseries

   ArraySetAsSeries(BufferPain,true);

   ArraySetAsSeries(BufferMAOpen,true);

   ArraySetAsSeries(BufferMAHigh,true);

   ArraySetAsSeries(BufferMALow,true);

   ArraySetAsSeries(BufferMAClose,true);

//--- create MA's handles

   ResetLastError();

   handle_mao=iMA(NULL,PERIOD_CURRENT,period,0,InpMethod,PRICE_OPEN);

   if(handle_mao==INVALID_HANDLE)

     {

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

      return INIT_FAILED;

     }

   handle_mah=iMA(NULL,PERIOD_CURRENT,period,0,InpMethod,PRICE_HIGH);

   if(handle_mah==INVALID_HANDLE)

     {

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

      return INIT_FAILED;

     }

   handle_mal=iMA(NULL,PERIOD_CURRENT,period,0,InpMethod,PRICE_LOW);

   if(handle_mal==INVALID_HANDLE)

     {

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

      return INIT_FAILED;

     }

   handle_mac=iMA(NULL,PERIOD_CURRENT,period,0,InpMethod,PRICE_CLOSE);

   if(handle_mac==INVALID_HANDLE)

     {

      Print("The iMA(",(string)period,") by PRICE_CLOSE 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-1;

      ArrayInitialize(BufferPain,EMPTY_VALUE);

      ArrayInitialize(BufferMAOpen,0);

      ArrayInitialize(BufferMAHigh,0);

      ArrayInitialize(BufferMALow,0);

      ArrayInitialize(BufferMAClose,0);

     }

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

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

   copied=CopyBuffer(handle_mao,0,0,count,BufferMAOpen);

   if(copied!=count) return 0;

   copied=CopyBuffer(handle_mah,0,0,count,BufferMAHigh);

   if(copied!=count) return 0;

   copied=CopyBuffer(handle_mal,0,0,count,BufferMALow);

   if(copied!=count) return 0;

   copied=CopyBuffer(handle_mac,0,0,count,BufferMAClose);

   if(copied!=count) return 0;



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

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

      BufferPain[i]=(3.0*BufferMAClose[i]-BufferMAOpen[i]-BufferMAHigh[i]-BufferMALow[i])/2.0;



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

      return(rates_total);

  }

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