68 lines
2.7 KiB
MQL5
68 lines
2.7 KiB
MQL5
 | //+------------------------------------------------------------------+
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//| Momentum.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_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 clrDodgerBlue
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//--- input parameters
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input int InpMomentumPeriod=14; // Period
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//--- indicator buffer
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double ExtMomentumBuffer[];
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int ExtMomentumPeriod;
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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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//--- check for input value
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if(InpMomentumPeriod<0)
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{
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ExtMomentumPeriod=14;
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Print("Input parameter InpMomentumPeriod has wrong value. Indicator will use value ",ExtMomentumPeriod);
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}
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else
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ExtMomentumPeriod=InpMomentumPeriod;
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//--- buffers
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SetIndexBuffer(0,ExtMomentumBuffer,INDICATOR_DATA);
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//--- name for DataWindow and indicator subwindow label
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IndicatorSetString(INDICATOR_SHORTNAME,"Momentum("+string(ExtMomentumPeriod)+")");
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//--- sets first bar from what index will be drawn
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PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,ExtMomentumPeriod-1);
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//--- sets drawing line empty value
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PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,0.0);
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//--- digits
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IndicatorSetInteger(INDICATOR_DIGITS,2);
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}
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//+------------------------------------------------------------------+
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//| Momentum |
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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 int begin,
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const double &price[])
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{
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int start_position=(ExtMomentumPeriod-1)+begin;
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if(rates_total<start_position)
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return(0);
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//--- correct draw begin
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if(prev_calculated==0 && begin>0)
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PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,start_position+(ExtMomentumPeriod-1));
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//--- start working, detect position
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int pos=prev_calculated-1;
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if(pos<start_position)
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pos=begin+ExtMomentumPeriod;
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//--- main cycle
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for(int i=pos; i<rates_total && !IsStopped(); i++)
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ExtMomentumBuffer[i]=price[i]*100/price[i-ExtMomentumPeriod];
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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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