114 lines
4.3 KiB
Plaintext
114 lines
4.3 KiB
Plaintext
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//+------------------------------------------------------------------+
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//| Price_Channell.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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//--- indicator settings
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#property indicator_chart_window
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#property indicator_buffers 3
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#property indicator_plots 2
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#property indicator_type1 DRAW_FILLING
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#property indicator_type2 DRAW_LINE
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#property indicator_color1 DodgerBlue,Gray
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#property indicator_color2 Blue
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#property indicator_label1 "Channel upper;Channel lower"
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#property indicator_label2 "Channel median"
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//--- input parameters
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input int InpChannelPeriod=22; // Period
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//--- indicator buffers
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double ExtHighBuffer[];
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double ExtLowBuffer[];
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double ExtMiddBuffer[];
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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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//--- indicator buffers mapping
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SetIndexBuffer(0,ExtHighBuffer,INDICATOR_DATA);
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SetIndexBuffer(1,ExtLowBuffer,INDICATOR_DATA);
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SetIndexBuffer(2,ExtMiddBuffer,INDICATOR_DATA);
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//--- set accuracy
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IndicatorSetInteger(INDICATOR_DIGITS,_Digits);
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//--- set first bar from what index will be drawn
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PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,InpChannelPeriod);
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//---- line shifts when drawing
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PlotIndexSetInteger(0,PLOT_SHIFT,1);
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PlotIndexSetInteger(1,PLOT_SHIFT,1);
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//--- name for DataWindow and indicator label
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IndicatorSetString(INDICATOR_SHORTNAME,"Price Channel("+string(InpChannelPeriod)+")");
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PlotIndexSetString(0,PLOT_LABEL,"Channel("+string(InpChannelPeriod)+") upper;Channel("+string(InpChannelPeriod)+") lower");
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PlotIndexSetString(1,PLOT_LABEL,"Median("+string(InpChannelPeriod)+")");
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//--- set drawing line empty value
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PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,0.0);
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PlotIndexSetDouble(1,PLOT_EMPTY_VALUE,0.0);
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//--- initialization done
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}
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//+------------------------------------------------------------------+
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//| get highest value for range |
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//+------------------------------------------------------------------+
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double Highest(const double &array[],int range,int fromIndex)
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{
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double res;
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int i;
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//---
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res=array[fromIndex];
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for(i=fromIndex;i>fromIndex-range && i>=0;i--)
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{
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if(res<array[i]) res=array[i];
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}
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//---
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return(res);
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}
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//+------------------------------------------------------------------+
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//| get lowest value for range |
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//+------------------------------------------------------------------+
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double Lowest(const double &array[],int range,int fromIndex)
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{
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double res;
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int i;
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//---
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res=array[fromIndex];
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for(i=fromIndex;i>fromIndex-range && i>=0;i--)
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{
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if(res>array[i]) res=array[i];
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}
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//---
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return(res);
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}
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//+------------------------------------------------------------------+
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//| Price Channell |
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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 datetime &time[],
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const double &open[],
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const double &high[],
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const double &low[],
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const double &close[],
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const long &tick_volume[],
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const long &volume[],
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const int &spread[])
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{
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int i,limit;
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//--- check for rates
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if(rates_total<InpChannelPeriod)
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return(0);
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//--- preliminary calculations
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if(prev_calculated==0)
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limit=InpChannelPeriod;
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else limit=prev_calculated-1;
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//--- the main loop of calculations
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for(i=limit;i<rates_total && !IsStopped();i++)
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{
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ExtHighBuffer[i]=Highest(high,InpChannelPeriod,i);
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ExtLowBuffer[i]=Lowest(low,InpChannelPeriod,i);
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ExtMiddBuffer[i]=(ExtHighBuffer[i]+ExtLowBuffer[i])/2.0;;
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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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