Pierre8rTeam
79 lines
3.2 KiB
Plaintext
79 lines
3.2 KiB
Plaintext
//+------------------------------------------------------------------+
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//| SMA.mq5 |
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//| Copyright 2009, MetaQuotes Software Corp. |
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//| http://www.mql5.com |
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//+------------------------------------------------------------------+
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//---- the indicator will be plotted in the main window
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#property indicator_chart_window
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//---- one buffer will be used for the calculations and plot of the indicator
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#property indicator_buffers 1
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//---- only one graphic plot is used
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#property indicator_plots 1
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//---- the indicator should be plotted as a line
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#property indicator_type1 DRAW_LINE
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//---- the color of the indicator's line is red
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#property indicator_color1 Red
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//---- indicator input parameters
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input int MAPeriod = 13; //Averaging period
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input int MAShift = 0; //Horizontal shift (in bars)
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//---- the declaration of the dynamic array
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//that will be used further as an indicator's buffer
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double ExtLineBuffer[];
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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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//----+
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//---- assign the dynamic array ExtLineBuffer with 0th indicator's buffer
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SetIndexBuffer(0,ExtLineBuffer,INDICATOR_DATA);
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//---- set plot shift along the horizontal axis by MAShift bars
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PlotIndexSetInteger(0,PLOT_SHIFT,MAShift);
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//---- set plot begin from the bar with number MAPeriod
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PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,MAPeriod);
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//----+
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}
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//+------------------------------------------------------------------+
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//| Custom indicator iteration function |
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//+------------------------------------------------------------------+
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int OnCalculate(
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const int rates_total, // number of available bars in history at the current tick
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const int prev_calculated,// number of bars, calculated at previous tick
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const int begin, // index of the first bar
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const double &price[] // price array for the calculation
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)
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{
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//----+
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//---- check for the presence of bars, sufficient for the calculation
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if (rates_total < MAPeriod - 1 + begin)
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return(0);
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//---- declaration of local variables
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int first, bar, iii;
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double Sum, SMA;
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//---- calculation of starting index first of the main loop
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if(prev_calculated==0) // check for the first start of the indicator
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first=MAPeriod-1+begin; // start index for all the bars
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else first=prev_calculated-1; // start index for the new bars
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//---- main loop of the calculation
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for(bar = first; bar < rates_total; bar++)
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{
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Sum=0.0;
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//---- summation loop for the current bar averaging
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for(iii=0;iii<MAPeriod;iii++)
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Sum+=price[bar-iii]; // It's equal to: Sum = Sum + price[bar - iii];
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//---- calculate averaged value
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SMA=Sum/MAPeriod;
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//---- set the element of the indicator buffer with the value of SMA we have calculated
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ExtLineBuffer[bar]=SMA;
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}
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//----+
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return(rates_total);
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}
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//+------------------------------------------------------------------+ |