| //+------------------------------------------------------------------+
|
| //| Envelopes.mq5 |
|
| //| Copyright 2000-2025, MetaQuotes Ltd. |
|
| //| https://www.mql5.com |
|
| //+------------------------------------------------------------------+
|
| #property copyright "Copyright 2000-2025, MetaQuotes Ltd."
|
| #property link "https://www.mql5.com"
|
| //--- indicator settings
|
| #property indicator_chart_window
|
| #property indicator_buffers 3
|
| #property indicator_plots 2
|
| #property indicator_type1 DRAW_LINE
|
| #property indicator_type2 DRAW_LINE
|
| #property indicator_color1 clrBlue
|
| #property indicator_color2 clrRed
|
| #property indicator_label1 "Upper band"
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| #property indicator_label2 "Lower band"
|
| //--- input parameters
|
| input int InpMAPeriod=14; // Period
|
| input int InpMAShift=0; // Shift
|
| input ENUM_MA_METHOD InpMAMethod=MODE_SMA; // Method
|
| input ENUM_APPLIED_PRICE InpAppliedPrice=PRICE_CLOSE; // Applied price
|
| input double InpDeviation=0.1; // Deviation
|
| //--- indicator buffers
|
| double ExtUpBuffer[];
|
| double ExtDownBuffer[];
|
| double ExtMABuffer[];
|
|
|
| int ExtMAHandle;
|
| //+------------------------------------------------------------------+
|
| //| Custom indicator initialization function |
|
| //+------------------------------------------------------------------+
|
| void OnInit()
|
| {
|
| //--- indicator buffers mapping
|
| SetIndexBuffer(0,ExtUpBuffer,INDICATOR_DATA);
|
| SetIndexBuffer(1,ExtDownBuffer,INDICATOR_DATA);
|
| SetIndexBuffer(2,ExtMABuffer,INDICATOR_CALCULATIONS);
|
| //---
|
| IndicatorSetInteger(INDICATOR_DIGITS,_Digits+1);
|
| //--- sets first bar from what index will be drawn
|
| PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,InpMAPeriod-1);
|
| //--- name for DataWindow
|
| string short_name=StringFormat("Env(%d)",InpMAPeriod);
|
| IndicatorSetString(INDICATOR_SHORTNAME,short_name);
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| PlotIndexSetString(0,PLOT_LABEL,short_name+" Upper");
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| PlotIndexSetString(1,PLOT_LABEL,short_name+" Lower");
|
| //--- line shifts when drawing
|
| PlotIndexSetInteger(0,PLOT_SHIFT,InpMAShift);
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| PlotIndexSetInteger(1,PLOT_SHIFT,InpMAShift);
|
| //---
|
| ExtMAHandle=iMA(NULL,0,InpMAPeriod,0,InpMAMethod,InpAppliedPrice);
|
| }
|
| //+------------------------------------------------------------------+
|
| //| Envelopes |
|
| //+------------------------------------------------------------------+
|
| 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[],
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| const long &volume[],
|
| const int &spread[])
|
| {
|
| if(rates_total<InpMAPeriod)
|
| return(0);
|
|
|
| int calculated=BarsCalculated(ExtMAHandle);
|
| if(calculated<rates_total)
|
| {
|
| Print("Not all data of ExtMAHandle is calculated (",calculated," bars). Error ",GetLastError());
|
| return(0);
|
| }
|
| //--- we can copy not all data
|
| int to_copy;
|
| if(prev_calculated>rates_total || prev_calculated<0)
|
| to_copy=rates_total;
|
| else
|
| {
|
| to_copy=rates_total-prev_calculated;
|
| if(prev_calculated>0)
|
| to_copy++;
|
| }
|
| //--- get ma buffer
|
| if(IsStopped()) // checking for stop flag
|
| return(0);
|
| if(CopyBuffer(ExtMAHandle,0,0,to_copy,ExtMABuffer)<=0)
|
| {
|
| Print("Getting MA data is failed! Error ",GetLastError());
|
| return(0);
|
| }
|
| //--- preliminary calculations
|
| int start=prev_calculated-1;
|
| if(start<InpMAPeriod)
|
| start=InpMAPeriod;
|
| //--- the main loop of calculations
|
| for(int i=start; i<rates_total && !IsStopped(); i++)
|
| {
|
| ExtUpBuffer[i]=(1+InpDeviation/100.0)*ExtMABuffer[i];
|
| ExtDownBuffer[i]=(1-InpDeviation/100.0)*ExtMABuffer[i];
|
| }
|
| //--- OnCalculate done. Return new prev_calculated.
|
| return(rates_total);
|
| }
|
| //+------------------------------------------------------------------+
|
