109 lines
4.1 KiB
MQL5
109 lines
4.1 KiB
MQL5
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//+------------------------------------------------------------------+
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//| Envelopes.mq5 |
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//| Copyright 2000-2025, MetaQuotes Ltd. |
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//| https://www.mql5.com |
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//+------------------------------------------------------------------+
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#property copyright "Copyright 2000-2025, MetaQuotes Ltd."
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#property link "https://www.mql5.com"
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//--- indicator settings
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#property indicator_chart_window
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#property indicator_buffers 3
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#property indicator_plots 2
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#property indicator_type1 DRAW_LINE
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#property indicator_type2 DRAW_LINE
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#property indicator_color1 clrBlue
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#property indicator_color2 clrRed
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#property indicator_label1 "Upper band"
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#property indicator_label2 "Lower band"
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//--- input parameters
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input int InpMAPeriod=14; // Period
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input int InpMAShift=0; // Shift
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input ENUM_MA_METHOD InpMAMethod=MODE_SMA; // Method
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input ENUM_APPLIED_PRICE InpAppliedPrice=PRICE_CLOSE; // Applied price
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input double InpDeviation=0.1; // Deviation
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//--- indicator buffers
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double ExtUpBuffer[];
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double ExtDownBuffer[];
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double ExtMABuffer[];
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int ExtMAHandle;
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//+------------------------------------------------------------------+
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//| Custom indicator initialization function |
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//+------------------------------------------------------------------+
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void OnInit()
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{
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//--- indicator buffers mapping
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SetIndexBuffer(0,ExtUpBuffer,INDICATOR_DATA);
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SetIndexBuffer(1,ExtDownBuffer,INDICATOR_DATA);
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SetIndexBuffer(2,ExtMABuffer,INDICATOR_CALCULATIONS);
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//---
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IndicatorSetInteger(INDICATOR_DIGITS,_Digits+1);
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//--- sets first bar from what index will be drawn
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PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,InpMAPeriod-1);
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//--- name for DataWindow
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string short_name=StringFormat("Env(%d)",InpMAPeriod);
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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");
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//--- line shifts when drawing
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PlotIndexSetInteger(0,PLOT_SHIFT,InpMAShift);
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PlotIndexSetInteger(1,PLOT_SHIFT,InpMAShift);
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//---
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ExtMAHandle=iMA(NULL,0,InpMAPeriod,0,InpMAMethod,InpAppliedPrice);
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}
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//+------------------------------------------------------------------+
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//| Envelopes |
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//+------------------------------------------------------------------+
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int OnCalculate(const int rates_total,
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const int prev_calculated,
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const datetime &time[],
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const double &open[],
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const double &high[],
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const double &low[],
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const double &close[],
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const long &tick_volume[],
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const long &volume[],
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const int &spread[])
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{
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if(rates_total<InpMAPeriod)
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return(0);
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int calculated=BarsCalculated(ExtMAHandle);
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if(calculated<rates_total)
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{
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Print("Not all data of ExtMAHandle is calculated (",calculated," bars). Error ",GetLastError());
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return(0);
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}
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//--- we can copy not all data
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int to_copy;
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if(prev_calculated>rates_total || prev_calculated<0)
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to_copy=rates_total;
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else
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{
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to_copy=rates_total-prev_calculated;
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if(prev_calculated>0)
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to_copy++;
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}
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//--- get ma buffer
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if(IsStopped()) // checking for stop flag
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return(0);
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if(CopyBuffer(ExtMAHandle,0,0,to_copy,ExtMABuffer)<=0)
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{
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Print("Getting MA data is failed! Error ",GetLastError());
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return(0);
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}
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//--- preliminary calculations
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int start=prev_calculated-1;
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if(start<InpMAPeriod)
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start=InpMAPeriod;
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//--- the main loop of calculations
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for(int i=start; i<rates_total && !IsStopped(); i++)
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{
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ExtUpBuffer[i]=(1+InpDeviation/100.0)*ExtMABuffer[i];
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ExtDownBuffer[i]=(1-InpDeviation/100.0)*ExtMABuffer[i];
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}
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//--- OnCalculate done. Return new prev_calculated.
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return(rates_total);
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}
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//+------------------------------------------------------------------+
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