| //+------------------------------------------------------------------+
|
| //| VROC.mq5 |
|
| //| Copyright 2000-2025, MetaQuotes Ltd. |
|
| //| https://www.mql5.com |
|
| //+------------------------------------------------------------------+
|
| #property copyright "Copyright 2000-2025, MetaQuotes Ltd."
|
| #property link "https://www.mql5.com"
|
| #property description "Volume Rate of Change"
|
| //--- indicator settings
|
| #property indicator_separate_window
|
| #property indicator_buffers 1
|
| #property indicator_plots 1
|
| #property indicator_type1 DRAW_LINE
|
| #property indicator_color1 clrGreen
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| #property indicator_style1 0
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| #property indicator_width1 1
|
| //+------------------------------------------------------------------+
|
| //| |
|
| //+------------------------------------------------------------------+
|
| //--- input parametrs
|
| input int InpPeriodVROC=25; // Period
|
| input ENUM_APPLIED_VOLUME InpVolumeType=VOLUME_TICK; // Volumes
|
| //--- indicator buffer
|
| double ExtVROCBuffer[];
|
|
|
| int ExtPeriodVROC;
|
| //+------------------------------------------------------------------+
|
| //| VROC initialization function |
|
| //+------------------------------------------------------------------+
|
| void OnInit()
|
| {
|
| //--- check for input value
|
| if(InpPeriodVROC<=1)
|
| {
|
| ExtPeriodVROC=25;
|
| PrintFormat("Incorrect value for input variable InpPeriodVROC=%d. Indicator will use value=%d for calculations.",
|
| InpPeriodVROC,ExtPeriodVROC);
|
| }
|
| else
|
| ExtPeriodVROC=InpPeriodVROC;
|
| //--- define index buffer
|
| SetIndexBuffer(0,ExtVROCBuffer);
|
| //--- set indicator short name
|
| IndicatorSetString(INDICATOR_SHORTNAME,"VROC("+string(ExtPeriodVROC)+")");
|
| //--- set indicator digits
|
| IndicatorSetInteger(INDICATOR_DIGITS,2);
|
| //--- set draw begin
|
| PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,ExtPeriodVROC-1);
|
| }
|
| //+------------------------------------------------------------------+
|
| //| Volume Rate of Change |
|
| //+------------------------------------------------------------------+
|
| int OnCalculate(const int rates_total,
|
| const int prev_calculated,
|
| const datetime &time[],
|
| const double &open[],
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| const double &high[],
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| const double &low[],
|
| const double &close[],
|
| const long &tick_volume[],
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| const long &volume[],
|
| const int &spread[])
|
| {
|
| if(rates_total<ExtPeriodVROC)
|
| return(0);
|
| //--- starting work
|
| int pos=prev_calculated-1;
|
| if(pos<ExtPeriodVROC-1)
|
| {
|
| pos=ExtPeriodVROC-1;
|
| for(int i=0; i<pos; i++)
|
| ExtVROCBuffer[i]=0.0;
|
| }
|
| //--- main cycle by volume type
|
| if(InpVolumeType==VOLUME_TICK)
|
| CalculateVROC(pos,rates_total,tick_volume);
|
| else
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| CalculateVROC(pos,rates_total,volume);
|
| //--- OnCalculate done. Return new prev_calculated.
|
| return(rates_total);
|
| }
|
| //+------------------------------------------------------------------+
|
| //| Calculate VROC by volume argument |
|
| //+------------------------------------------------------------------+
|
| void CalculateVROC(const int pos,const int rates_total,const long& volume[])
|
| {
|
| for(int i=pos; i<rates_total && !IsStopped(); i++)
|
| {
|
| double prev_volume=(double)(volume[i-(ExtPeriodVROC-1)]);
|
| double curr_volume=(double)volume[i];
|
| //--- calculate VROC
|
| if(prev_volume!=0.0)
|
| ExtVROCBuffer[i]=100.0*(curr_volume-prev_volume)/prev_volume;
|
| else
|
| ExtVROCBuffer[i]=ExtVROCBuffer[i-1];
|
| }
|
| }
|
| //+------------------------------------------------------------------+
|
