66 lines
2.6 KiB
MQL5
66 lines
2.6 KiB
MQL5
 | //+------------------------------------------------------------------+
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//| ROC.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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#property description "Rate of Change"
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//--- indicator settings
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#property indicator_separate_window
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#property indicator_buffers 1
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#property indicator_plots 1
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#property indicator_type1 DRAW_LINE
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#property indicator_color1 clrLightSeaGreen
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//--- input parameters
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input int InpRocPeriod=12; // Period
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//--- indicator buffer
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double ExtRocBuffer[];
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int ExtRocPeriod;
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//+------------------------------------------------------------------+
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//| Rate of Change initialization function |
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//+------------------------------------------------------------------+
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void OnInit()
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{
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//--- check for input
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if(InpRocPeriod<1)
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{
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ExtRocPeriod=12;
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PrintFormat("Incorrect value for input variable InpRocPeriod = %d. Indicator will use value %d for calculations.",
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InpRocPeriod,ExtRocPeriod);
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}
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else
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ExtRocPeriod=InpRocPeriod;
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//--- indicator buffers mapping
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SetIndexBuffer(0,ExtRocBuffer,INDICATOR_DATA);
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//--- set accuracy
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IndicatorSetInteger(INDICATOR_DIGITS,2);
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//--- name for DataWindow and indicator subwindow label
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IndicatorSetString(INDICATOR_SHORTNAME,"ROC("+string(ExtRocPeriod)+")");
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//--- sets first bar from what index will be drawn
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PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,ExtRocPeriod);
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}
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//+------------------------------------------------------------------+
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//| Rate of Change |
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//+------------------------------------------------------------------+
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int OnCalculate(const int rates_total,const int prev_calculated,const int begin,const double &price[])
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{
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if(rates_total<ExtRocPeriod)
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return(0);
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//--- preliminary calculations
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int pos=prev_calculated-1;
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if(pos<ExtRocPeriod)
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pos=ExtRocPeriod;
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//--- the main loop of calculations
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for(int i=pos; i<rates_total && !IsStopped(); i++)
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{
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if(price[i]==0.0)
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ExtRocBuffer[i]=0.0;
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else
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ExtRocBuffer[i]=(price[i]-price[i-ExtRocPeriod])/price[i]*100;
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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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