//+------------------------------------------------------------------+ //| DHLPBO.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 "Dynamic High/Low Percentage Band indicator" #property indicator_chart_window #property indicator_buffers 2 #property indicator_plots 2 //--- plot UP #property indicator_label1 "DHLPBO Top" #property indicator_type1 DRAW_LINE #property indicator_color1 clrGreen #property indicator_style1 STYLE_SOLID #property indicator_width1 1 //--- plot DN #property indicator_label2 "DHLPBO Bottom" #property indicator_type2 DRAW_LINE #property indicator_color2 clrRed #property indicator_style2 STYLE_SOLID #property indicator_width2 1 //--- input parameters input uint InpPeriod = 14; // Period input double InpStep = 0.7071; // Expansion //--- indicator buffers double BufferUP[]; double BufferDN[]; //--- global variables double step; int period; //+------------------------------------------------------------------+ //| Custom indicator initialization function | //+------------------------------------------------------------------+ int OnInit() { //--- set global variables period=int(InpPeriod<1 ? 1 : InpPeriod); step=InpStep; //--- indicator buffers mapping SetIndexBuffer(0,BufferUP,INDICATOR_DATA); SetIndexBuffer(1,BufferDN,INDICATOR_DATA); //--- setting indicator parameters IndicatorSetString(INDICATOR_SHORTNAME,"DHLPBO ("+(string)period+","+DoubleToString(step,4)+")"); IndicatorSetInteger(INDICATOR_DIGITS,Digits()); //--- setting plot buffer parameters PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,0); PlotIndexSetDouble(1,PLOT_EMPTY_VALUE,0); //--- setting buffer arrays as timeseries ArraySetAsSeries(BufferUP,true); ArraySetAsSeries(BufferDN,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[]) { //--- Установка массивов буферов как таймсерий ArraySetAsSeries(high,true); ArraySetAsSeries(low,true); //--- 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-2; ArrayInitialize(BufferUP,EMPTY_VALUE); ArrayInitialize(BufferDN,EMPTY_VALUE); } //--- Расчёт индикатора for(int i=limit; i>=0 && !IsStopped(); i--) { int bh=Highest(period,i); int bl=Lowest(period,i); if(bh==WRONG_VALUE || bl==WRONG_VALUE) continue; double max=high[bh]; double min=low[bl]; BufferUP[i]=max-(max-min)*(bh-i)*step/100.0; BufferDN[i]=min+(max-min)*(bl-i)*step/100.0; } //--- return value of prev_calculated for next call return(rates_total); } //+------------------------------------------------------------------+ //| Возвращает индекс максимального значения таймсерии High | //+------------------------------------------------------------------+ int Highest(const int count,const int start) { double array[]; ArraySetAsSeries(array,true); return(CopyHigh(Symbol(),PERIOD_CURRENT,start,count,array)==count ? ArrayMaximum(array)+start : WRONG_VALUE); } //+------------------------------------------------------------------+ //| Возвращает индекс минимального значения таймсерии Low | //+------------------------------------------------------------------+ int Lowest(const int count,const int start) { double array[]; ArraySetAsSeries(array,true); return(CopyLow(Symbol(),PERIOD_CURRENT,start,count,array)==count ? ArrayMinimum(array)+start : WRONG_VALUE); return WRONG_VALUE; } //+------------------------------------------------------------------+