94 lines
7.1 KiB
Plaintext
94 lines
7.1 KiB
Plaintext
//+------------------------------------------------------------------+
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//| Mage Moving Average-RMA |
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//| Copyright 2023, MetaQuotes Ltd. |
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//| https://www.mql5.com |
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//+------------------------------------------------------------------+
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#property copyright "Copyright 2023, Mage"
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#property link "https://www.mql5.com"
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#property version "1.00"
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#property indicator_chart_window
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#property indicator_buffers 1
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#property indicator_plots 1
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//--- plot Slow Speed Line
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#property indicator_label1 "RMA"
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#property indicator_type1 DRAW_LINE
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#property indicator_color1 clrRed
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#property indicator_style1 STYLE_SOLID
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#property indicator_width1 1
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//--- input parameters
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input int InpPeriod =12; //RMA Period
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//--- indicator buffers
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double buffer_m[];
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//+------------------------------------------------------------------+
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//| Custom indicator initialization function |
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//+------------------------------------------------------------------+
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int OnInit()
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{
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//--- indicator buffers mapping
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SetIndexBuffer(0,buffer_m,INDICATOR_DATA);
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//--- set Digits
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IndicatorSetInteger(INDICATOR_DIGITS,_Digits+1);
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//---name
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IndicatorSetString(INDICATOR_SHORTNAME,"Mage_RMA"+string(InpPeriod));
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//--- set first bar from what index will be drawn
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PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,InpPeriod);
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//---
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return(INIT_SUCCEEDED);
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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(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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ExponentialMAOnBuffer(rates_total,prev_calculated,0,InpPeriod,price,buffer_m);
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return(rates_total);
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}
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//+------------------------------------------------------------------+
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//| Calculation Buffer |
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//+------------------------------------------------------------------+
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int ExponentialMAOnBuffer(const int rates_total,const int prev_calculated,const int begin,const int period,const double& price[],double& buffer[])
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{
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//--- check period
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if(period<=1 || period>(rates_total-begin))
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return(0);
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//--- save and clear 'as_series' flags
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bool as_series_price=ArrayGetAsSeries(price);
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bool as_series_buffer=ArrayGetAsSeries(buffer);
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ArraySetAsSeries(price,false);
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ArraySetAsSeries(buffer,false);
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//--- calculate start position
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int start_position;
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double smooth_factor=1.0/period;
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if(prev_calculated==0) // first calculation or number of bars was changed
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{
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//--- set empty value for first bars
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for(int i=0; i<begin; i++)
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buffer[i]=0.0;
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//--- calculate first visible value
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start_position=period+begin;
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buffer[begin] =price[begin];
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for(int i=begin+1; i<start_position; i++)
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buffer[i]=price[i]*smooth_factor+buffer[i-1]*(1.0-smooth_factor);
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}
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else
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start_position=prev_calculated-1;
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//--- main loop
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for(int i=start_position; i<rates_total; i++)
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buffer[i]=price[i]*smooth_factor+buffer[i-1]*(1.0-smooth_factor);
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//--- restore as_series flags
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ArraySetAsSeries(price,as_series_price);
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ArraySetAsSeries(buffer,as_series_buffer);
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//---
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return(rates_total);
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}
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//+------------------------------------------------------------------+
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