//+------------------------------------------------------------------+ //| PDO.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 "Percent Difference Oscillator indicator" #property indicator_separate_window #property indicator_buffers 3 #property indicator_plots 1 //--- plot PDO #property indicator_label1 "PDO" #property indicator_type1 DRAW_LINE #property indicator_color1 clrOliveDrab #property indicator_style1 STYLE_SOLID #property indicator_width1 1 //--- input parameters input uint InpPeriod = 14; // Period input ENUM_MA_METHOD InpMethod = MODE_SMA; // Method input ENUM_APPLIED_PRICE InpAppliedPrice = PRICE_CLOSE; // Applied price //--- indicator buffers double BufferPDO[]; double BufferMA1[]; double BufferMAP[]; //--- global variables int period; int handle_ma1; int handle_maP; //+------------------------------------------------------------------+ //| Custom indicator initialization function | //+------------------------------------------------------------------+ int OnInit() { //--- set global variables period=int(InpPeriod<1 ? 1 : InpPeriod); //--- indicator buffers mapping SetIndexBuffer(0,BufferPDO,INDICATOR_DATA); SetIndexBuffer(1,BufferMA1,INDICATOR_CALCULATIONS); SetIndexBuffer(2,BufferMAP,INDICATOR_CALCULATIONS); //--- setting indicator parameters IndicatorSetString(INDICATOR_SHORTNAME,"PDO ("+(string)period+")"); IndicatorSetInteger(INDICATOR_DIGITS,Digits()); //--- setting buffer arrays as timeseries ArraySetAsSeries(BufferPDO,true); ArraySetAsSeries(BufferMA1,true); ArraySetAsSeries(BufferMAP,true); //--- create MA's handles ResetLastError(); handle_ma1=iMA(NULL,PERIOD_CURRENT,1,0,MODE_SMA,InpAppliedPrice); if(handle_ma1==INVALID_HANDLE) { Print("The iMA(1) object was not created: Error ",GetLastError()); return INIT_FAILED; } handle_maP=iMA(NULL,PERIOD_CURRENT,period,0,InpMethod,InpAppliedPrice); if(handle_maP==INVALID_HANDLE) { Print("The iMA(",(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[]) { //--- Проверка и расчёт количества просчитываемых баров if(rates_total<4) return 0; //--- Проверка и расчёт количества просчитываемых баров int limit=rates_total-prev_calculated; if(limit>1) { limit=rates_total-1; ArrayInitialize(BufferPDO,EMPTY_VALUE); ArrayInitialize(BufferMA1,0); ArrayInitialize(BufferMAP,0); } //--- Подготовка данных int count=(limit>1 ? rates_total : 1),copied=0; copied=CopyBuffer(handle_ma1,0,0,count,BufferMA1); if(copied!=count) return 0; copied=CopyBuffer(handle_maP,0,0,count,BufferMAP); if(copied!=count) return 0; //--- Расчёт индикатора for(int i=limit; i>=0 && !IsStopped(); i--) { double MA=BufferMAP[i]; double Pr=BufferMA1[i]; BufferPDO[i]=(MA!=0 ? 100.0*(Pr-MA)/MA : 0); } //--- return value of prev_calculated for next call return(rates_total); } //+------------------------------------------------------------------+