70 lines
2.7 KiB
Plaintext
70 lines
2.7 KiB
Plaintext
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//+------------------------------------------------------------------+
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//| DPO.mq5 |
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//| Copyright 2009-2017, MetaQuotes Software Corp. |
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//| http://www.mql5.com |
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//+------------------------------------------------------------------+
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#property copyright "2009-2017, MetaQuotes Software Corp."
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#property link "http://www.mql5.com"
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#property description "Detrended Price Oscillator"
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#include <MovingAverages.mqh>
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//--- indicator settings
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#property indicator_separate_window
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#property indicator_buffers 2
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#property indicator_plots 1
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#property indicator_type1 DRAW_LINE
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#property indicator_color1 DodgerBlue
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//--- input parameters
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input int InpDetrendPeriod=12; // Period
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//--- indicator buffers
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double ExtDPOBuffer[];
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double ExtMABuffer[];
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//--- global variable
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int ExtMAPeriod;
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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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//--- get length of cycle for smoothing
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ExtMAPeriod=InpDetrendPeriod/2+1;
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//--- indicator buffers mapping
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SetIndexBuffer(0,ExtDPOBuffer,INDICATOR_DATA);
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SetIndexBuffer(1,ExtMABuffer,INDICATOR_CALCULATIONS);
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//--- set accuracy
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IndicatorSetInteger(INDICATOR_DIGITS,_Digits+1);
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//--- set first bar from what index will be drawn
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PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,ExtMAPeriod-1);
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//--- name for DataWindow and indicator subwindow label
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IndicatorSetString(INDICATOR_SHORTNAME,"DPO("+string(InpDetrendPeriod)+")");
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//--- initialization done
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}
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//+------------------------------------------------------------------+
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//| Detrended Price Oscillator |
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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 limit;
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int firstInd=begin+ExtMAPeriod-1;
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//--- correct draw begin
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if(begin>0) PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,firstInd);
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//--- preliminary calculations
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if(prev_calculated<firstInd)
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{
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//--- filling
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ArrayInitialize(ExtDPOBuffer,0.0);
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limit=firstInd;
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}
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else limit=prev_calculated-1;
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//--- calculate simple moving average
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SimpleMAOnBuffer(rates_total,prev_calculated,begin,ExtMAPeriod,price,ExtMABuffer);
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//--- the main loop of calculations
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for(int i=limit;i<rates_total && !IsStopped();i++)
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ExtDPOBuffer[i]=price[i]-ExtMABuffer[i];
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//--- done
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return(rates_total);
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}
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//+------------------------------------------------------------------+
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