| //+------------------------------------------------------------------+
|
| //| Momentum.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_separate_window
|
| #property indicator_buffers 1
|
| #property indicator_plots 1
|
| #property indicator_type1 DRAW_LINE
|
| #property indicator_color1 clrDodgerBlue
|
| //--- input parameters
|
| input int InpMomentumPeriod=14; // Period
|
| //--- indicator buffer
|
| double ExtMomentumBuffer[];
|
|
|
| int ExtMomentumPeriod;
|
| //+------------------------------------------------------------------+
|
| //| Custom indicator initialization function |
|
| //+------------------------------------------------------------------+
|
| void OnInit()
|
| {
|
| //--- check for input value
|
| if(InpMomentumPeriod<0)
|
| {
|
| ExtMomentumPeriod=14;
|
| Print("Input parameter InpMomentumPeriod has wrong value. Indicator will use value ",ExtMomentumPeriod);
|
| }
|
| else
|
| ExtMomentumPeriod=InpMomentumPeriod;
|
| //--- buffers
|
| SetIndexBuffer(0,ExtMomentumBuffer,INDICATOR_DATA);
|
| //--- name for DataWindow and indicator subwindow label
|
| IndicatorSetString(INDICATOR_SHORTNAME,"Momentum("+string(ExtMomentumPeriod)+")");
|
| //--- sets first bar from what index will be drawn
|
| PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,ExtMomentumPeriod-1);
|
| //--- sets drawing line empty value
|
| PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,0.0);
|
| //--- digits
|
| IndicatorSetInteger(INDICATOR_DIGITS,2);
|
| }
|
| //+------------------------------------------------------------------+
|
| //| Momentum |
|
| //+------------------------------------------------------------------+
|
| int OnCalculate(const int rates_total,
|
| const int prev_calculated,
|
| const int begin,
|
| const double &price[])
|
| {
|
| int start_position=(ExtMomentumPeriod-1)+begin;
|
| if(rates_total<start_position)
|
| return(0);
|
| //--- correct draw begin
|
| if(prev_calculated==0 && begin>0)
|
| PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,start_position+(ExtMomentumPeriod-1));
|
| //--- start working, detect position
|
| int pos=prev_calculated-1;
|
| if(pos<start_position)
|
| pos=begin+ExtMomentumPeriod;
|
| //--- main cycle
|
| for(int i=pos; i<rates_total && !IsStopped(); i++)
|
| ExtMomentumBuffer[i]=price[i]*100/price[i-ExtMomentumPeriod];
|
| //--- OnCalculate done. Return new prev_calculated.
|
| return(rates_total);
|
| }
|
| //+------------------------------------------------------------------+
|
