//+------------------------------------------------------------------+ //| Percentage_Crossover_Channel.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 clrSeaGreen #property indicator_style3 STYLE_SOLID #property indicator_width3 1 //--- input parameters input double InpPercent = 100.0; // Percent input ENUM_APPLIED_PRICE InpPrice = PRICE_CLOSE; // Applied price //--- indicator buffers double BufferUpper[]; double BufferMiddle[]; double BufferLower[]; double BufferSMA[]; //--- global variables double percent; double plus_value; double minus_value; int handle_ma; //+------------------------------------------------------------------+ //| Custom indicator initialization function | //+------------------------------------------------------------------+ int OnInit() { //--- settings variables percent=(InpPercent<=0 ? 0.001 : InpPercent)/100; plus_value=1+percent/100; minus_value=1-percent/100; handle_ma=iMA(Symbol(),PERIOD_CURRENT,1,0,MODE_SMA,InpPrice); if(handle_ma==INVALID_HANDLE){ Print("Error creating MA handle"); return INIT_FAILED; } //--- indicator buffers mapping SetIndexBuffer(0,BufferUpper,INDICATOR_DATA); SetIndexBuffer(1,BufferMiddle,INDICATOR_DATA); SetIndexBuffer(2,BufferLower,INDICATOR_DATA); SetIndexBuffer(3,BufferSMA,INDICATOR_CALCULATIONS); //--- settings indicators parameters IndicatorSetString(INDICATOR_SHORTNAME,"Percentage Crossover Channel"); //--- set arrays as timeseries ArraySetAsSeries(BufferLower,true); ArraySetAsSeries(BufferMiddle,true); ArraySetAsSeries(BufferUpper,true); ArraySetAsSeries(BufferSMA,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[]) { //--- Проверка на минимальное колиество 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-2; ArrayInitialize(BufferLower,EMPTY_VALUE); ArrayInitialize(BufferMiddle,EMPTY_VALUE); ArrayInitialize(BufferUpper,EMPTY_VALUE); ArrayInitialize(BufferSMA,EMPTY_VALUE); int copied=CopyBuffer(handle_ma,0,0,rates_total,BufferSMA); if(copied!=rates_total) return 0; } //--- Цикл расчёта индикатора for(int i=limit; i>=0; i--){ int total=(limit==0 ? 1 : limit); int copied=CopyBuffer(handle_ma,0,0,total,BufferSMA); if(copied!=total) return 0; double price=BufferSMA[i]; if(limit>1 && i==limit) BufferMiddle[i]=price; else BufferMiddle[i]=(price*minus_value>BufferMiddle[i+1] ? price*minus_value : price*plus_value