| //+------------------------------------------------------------------+
|
| //| DPO.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 "Detrended Price Oscillator"
|
| #include <MovingAverages.mqh>
|
| //--- indicator settings
|
| #property indicator_separate_window
|
| #property indicator_buffers 2
|
| #property indicator_plots 1
|
| #property indicator_type1 DRAW_LINE
|
| #property indicator_color1 clrDodgerBlue
|
| //--- input parameters
|
| input int InpDetrendPeriod=12; // Period
|
| //--- indicator buffers
|
| double ExtDPOBuffer[];
|
| double ExtMABuffer[];
|
|
|
| int ExtMAPeriod;
|
| //+------------------------------------------------------------------+
|
| //| Custom indicator initialization function |
|
| //+------------------------------------------------------------------+
|
| void OnInit()
|
| {
|
| //--- get length of cycle for smoothing
|
| ExtMAPeriod=InpDetrendPeriod/2+1;
|
| //--- indicator buffers mapping
|
| SetIndexBuffer(0,ExtDPOBuffer,INDICATOR_DATA);
|
| SetIndexBuffer(1,ExtMABuffer,INDICATOR_CALCULATIONS);
|
| //--- set accuracy
|
| IndicatorSetInteger(INDICATOR_DIGITS,_Digits+1);
|
| //--- set first bar from what index will be drawn
|
| PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,ExtMAPeriod-1);
|
| //--- name for DataWindow and indicator subwindow label
|
| string short_name=StringFormat("DPO(%d)",InpDetrendPeriod);
|
| IndicatorSetString(INDICATOR_SHORTNAME,short_name);
|
| }
|
| //+------------------------------------------------------------------+
|
| //| Detrended Price Oscillator |
|
| //+------------------------------------------------------------------+
|
| int OnCalculate(const int rates_total,
|
| const int prev_calculated,
|
| const int begin,
|
| const double &price[])
|
| {
|
| int start;
|
| int first_index=begin+ExtMAPeriod-1;
|
| //--- preliminary filling
|
| if(prev_calculated<first_index)
|
| {
|
| ArrayInitialize(ExtDPOBuffer,0.0);
|
| start=first_index;
|
| if(begin>0)
|
| PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,first_index);
|
| }
|
| else
|
| start=prev_calculated-1;
|
| //--- calculate simple moving average
|
| SimpleMAOnBuffer(rates_total,prev_calculated,begin,ExtMAPeriod,price,ExtMABuffer);
|
| //--- the main loop of calculations
|
| for(int i=start; i<rates_total && !IsStopped(); i++)
|
| ExtDPOBuffer[i]=price[i]-ExtMABuffer[i];
|
| //--- OnCalculate done. Return new prev_calculated.
|
| return(rates_total);
|
| }
|
| //+------------------------------------------------------------------+
|
