//+------------------------------------------------------------------+ //| BB-Decimal.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_chart_window #property indicator_buffers 4 #property indicator_plots 3 //--- plot Upper #property indicator_label1 "Upper" #property indicator_type1 DRAW_LINE #property indicator_color1 clrRed #property indicator_style1 STYLE_SOLID #property indicator_width1 1 //--- plot Middle #property indicator_label2 "Middle" #property indicator_type2 DRAW_LINE #property indicator_color2 clrBlue #property indicator_style2 STYLE_SOLID #property indicator_width2 1 //--- plot Lower #property indicator_label3 "Lower" #property indicator_type3 DRAW_LINE #property indicator_color3 clrGreen #property indicator_style3 STYLE_SOLID #property indicator_width3 1 //--- input parameters input uint InpPeriod = 20; // Period input double InpDeviation = 2.0; // Deviation input ENUM_APPLIED_PRICE InpAppliedPrice = PRICE_CLOSE; // Applied price //--- indicator buffers double BufferUpper[]; double BufferMiddle[]; double BufferLower[]; double BufferDev[]; //--- global variables int period; double deviation; int handle_ma; int handle_dev; //+------------------------------------------------------------------+ //| Custom indicator initialization function | //+------------------------------------------------------------------+ int OnInit() { //--- setting global variables period=int(InpPeriod<1 ? 1 : InpPeriod); deviation=(InpDeviation<0.01 ? 0.01 : InpDeviation); //--- indicator buffers mapping SetIndexBuffer(0,BufferUpper,INDICATOR_DATA); SetIndexBuffer(1,BufferMiddle,INDICATOR_DATA); SetIndexBuffer(2,BufferLower,INDICATOR_DATA); SetIndexBuffer(3,BufferDev,INDICATOR_CALCULATIONS); //--- settings indicators parameters IndicatorSetInteger(INDICATOR_DIGITS,Digits()); IndicatorSetString(INDICATOR_SHORTNAME,"BB-Decimal"); //--- setting buffer arrays as timeseries ArraySetAsSeries(BufferUpper,true); ArraySetAsSeries(BufferMiddle,true); ArraySetAsSeries(BufferLower,true); ArraySetAsSeries(BufferDev,true); //--- create MA and StdDev handles ResetLastError(); handle_ma=iMA(Symbol(),PERIOD_CURRENT,period,0,MODE_SMA,InpAppliedPrice); if(handle_ma==INVALID_HANDLE) { Print("The iMA(",(string)period,") object was not created: Error ",GetLastError()); return INIT_FAILED; } ResetLastError(); handle_dev=iStdDev(Symbol(),PERIOD_CURRENT,period,0,MODE_SMA,InpAppliedPrice); if(handle_dev==INVALID_HANDLE) { Print("The iStdDev(",(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 на минимальное количество баров для расчёта 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(BufferUpper,EMPTY_VALUE); ArrayInitialize(BufferMiddle,EMPTY_VALUE); ArrayInitialize(BufferLower,EMPTY_VALUE); ArrayInitialize(BufferDev,EMPTY_VALUE); } //--- Подготовка данных int copied=0,count=(limit==0 ? 1 : rates_total); copied=CopyBuffer(handle_ma,0,0,count,BufferMiddle); if(copied!=count) return 0; copied=CopyBuffer(handle_dev,0,0,count,BufferDev); if(copied!=count) return 0; //--- Расчёт индикатора for(int i=limit; i>=0; i--) { BufferUpper[i]=BufferMiddle[i]+deviation*BufferDev[i]; BufferLower[i]=BufferMiddle[i]-deviation*BufferDev[i]; } //--- return value of prev_calculated for next call return(rates_total); } //+------------------------------------------------------------------+