70 lines
2.8 KiB
MQL5
70 lines
2.8 KiB
MQL5
 | //+------------------------------------------------------------------+
| ||
//| DEMA.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 "Double Exponential Moving Average"
| |||
#include <MovingAverages.mqh>
| |||
//--- indicator settings
| |||
#property indicator_chart_window
| |||
#property indicator_buffers 3
| |||
#property indicator_plots 1
| |||
#property indicator_type1 DRAW_LINE
| |||
#property indicator_color1 clrDarkBlue
| |||
#property indicator_width1 1
| |||
#property indicator_label1 "DEMA"
| |||
#property indicator_applied_price PRICE_CLOSE
| |||
//--- input parameters
| |||
input int InpPeriodEMA=14; // EMA period
| |||
input int InpShift=0; // Indicator's shift
| |||
//--- indicator buffers
| |||
double DemaBuffer[];
| |||
double Ema[];
| |||
double EmaOfEma[];
| |||
//+------------------------------------------------------------------+
| |||
//| Custom indicator initialization function |
| |||
//+------------------------------------------------------------------+
| |||
void OnInit()
| |||
{
| |||
//--- indicator buffers mapping
| |||
SetIndexBuffer(0,DemaBuffer,INDICATOR_DATA);
| |||
SetIndexBuffer(1,Ema,INDICATOR_CALCULATIONS);
| |||
SetIndexBuffer(2,EmaOfEma,INDICATOR_CALCULATIONS);
| |||
//--- sets first bar from what index will be drawn
| |||
PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,2*InpPeriodEMA-2);
| |||
//--- sets indicator shift
| |||
PlotIndexSetInteger(0,PLOT_SHIFT,InpShift);
| |||
//--- name of label
| |||
string short_name=StringFormat("DEMA(%d)",InpPeriodEMA);
| |||
IndicatorSetString(INDICATOR_SHORTNAME,short_name);
| |||
PlotIndexSetString(0,PLOT_LABEL,short_name);
| |||
}
| |||
//+------------------------------------------------------------------+
| |||
//| Double Exponential Moving Average |
| |||
//+------------------------------------------------------------------+
| |||
int OnCalculate(const int rates_total,
| |||
const int prev_calculated,
| |||
const int begin,
| |||
const double &price[])
| |||
{
| |||
if(rates_total<2*InpPeriodEMA-2)
| |||
return(0);
| |||
//---
| |||
int start;
| |||
if(prev_calculated==0)
| |||
start=0;
| |||
else
| |||
start=prev_calculated-1;
| |||
//--- calculate EMA
| |||
ExponentialMAOnBuffer(rates_total,prev_calculated,0,InpPeriodEMA,price,Ema);
| |||
//--- calculate EMA on EMA array
| |||
ExponentialMAOnBuffer(rates_total,prev_calculated,InpPeriodEMA-1,InpPeriodEMA,Ema,EmaOfEma);
| |||
//--- calculate DEMA
| |||
for(int i=start; i<rates_total && !IsStopped(); i++)
| |||
DemaBuffer[i]=2.0*Ema[i]-EmaOfEma[i];
| |||
//--- OnCalculate done. Return new prev_calculated.
| |||
return(rates_total);
| |||
}
| |||
//+------------------------------------------------------------------+
|