//+------------------------------------------------------------------+
//| Custom Moving Average.mq4 |
//| Copyright © 2004, MetaQuotes Software Corp. |
//| http://www.metaquotes.net/ |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2004, MetaQuotes Software Corp."
#property link "http://www.metaquotes.net/"
#property indicator_chart_window
#property indicator_buffers 1
#property indicator_color1 DarkViolet
//---- indicator parameters
extern string note1 = "Moving Average";
extern int MA_Period=5;
extern int MA_Shift=0;
extern string note2 = "0=Simple,1=Exponential";
extern string note3 = "2=Smooth,3=Linear Weighted";
extern int MA_Method=0;
extern string note4 = "change color in the Colors area too";
extern color MAcolor1 = DarkViolet;
extern string note5 = "Display the info in what corner?";
extern string note6 = "Upper left=0; Upper right=1";
extern string note7 = "Lower left=2; Lower right=3";
extern int WhatCorner=1;
extern string note8 = "Y distance; add 10 to each MA";
extern int ydistance1=10;
double ExtMapBuffer[];
string objectma1;
int ExtCountedBars=0;
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
string IntToStr(int X)
{
return (DoubleToStr(X, 0));
}
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{
int draw_begin, ydistance2;
string short_name;
//---- drawing settings
SetIndexStyle(0,DRAW_LINE);
SetIndexShift(0,MA_Shift);
IndicatorDigits(MarketInfo(Symbol(),MODE_DIGITS));
if(MA_Period<2) MA_Period=13;
draw_begin=MA_Period-1;
//---- indicator short name
switch(MA_Method)
{
case 1 : short_name="EMA"; draw_begin=0; break;
case 2 : short_name="SMMA"; break;
case 3 : short_name="LWMA"; break;
default :
MA_Method=0;
short_name="SMA";
}
IndicatorShortName(short_name+MA_Period+")");
SetIndexDrawBegin(0,draw_begin);
//---- indicator buffers mapping
SetIndexBuffer(0,ExtMapBuffer);
//---- initialization done
if ((WhatCorner == 2) || (WhatCorner == 3))
{
ydistance2 = 50+ydistance1;
}
else
{
ydistance1 = 20+ydistance1;
}
objectma1 = "banzaiMA"+IntToStr(MA_Period);
ObjectCreate(objectma1, OBJ_LABEL, 0, 0, 0);
ObjectSetText(objectma1, short_name+"("+MA_Period+")", 8, "Arial", MAcolor1);
ObjectSet(objectma1, OBJPROP_CORNER, WhatCorner);
ObjectSet(objectma1, OBJPROP_XDISTANCE, 2);
ObjectSet(objectma1, OBJPROP_YDISTANCE, ydistance1);
return(0);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
int deinit()
{
ObjectDelete(objectma1);
return(0);
}
//+------------------------------------------------------------------+
int start()
{
if(Bars<=MA_Period) return(0);
ExtCountedBars=IndicatorCounted();
//---- check for possible errors
if (ExtCountedBars<0) return(-1);
//---- last counted bar will be recounted
if (ExtCountedBars>0) ExtCountedBars--;
//----
switch(MA_Method)
{
case 0 : sma(); break;
case 1 : ema(); break;
case 2 : smma(); break;
case 3 : lwma();
}
//---- done
return(0);
}
//+------------------------------------------------------------------+
//| Simple Moving Average |
//+------------------------------------------------------------------+
void sma()
{
double sum=0;
int i,pos=Bars-ExtCountedBars-1;
//---- initial accumulation
if(pos<MA_Period) pos=MA_Period;
for(i=1;i<MA_Period;i++,pos--)
sum+=Close[pos];
//---- main calculation loop
while(pos>=0)
{
sum+=Close[pos];
ExtMapBuffer[pos]=sum/MA_Period;
sum-=Close[pos+MA_Period-1];
pos--;
}
//---- zero initial bars
if(ExtCountedBars<1)
for(i=1;i<MA_Period;i++) ExtMapBuffer[Bars-i]=0;
}
//+------------------------------------------------------------------+
//| Exponential Moving Average |
//+------------------------------------------------------------------+
void ema()
{
double pr=2.0/(MA_Period+1);
int pos=Bars-2;
if(ExtCountedBars>2) pos=Bars-ExtCountedBars-1;
//---- main calculation loop
while(pos>=0)
{
if(pos==Bars-2) ExtMapBuffer[pos+1]=Close[pos+1];
ExtMapBuffer[pos]=Close[pos]*pr+ExtMapBuffer[pos+1]*(1-pr);
pos--;
}
}
//+------------------------------------------------------------------+
//| Smoothed Moving Average |
//+------------------------------------------------------------------+
void smma()
{
double sum=0;
int i,k,pos=Bars-ExtCountedBars+1;
//---- main calculation loop
pos=Bars-MA_Period;
if(pos>Bars-ExtCountedBars) pos=Bars-ExtCountedBars;
while(pos>=0)
{
if(pos==Bars-MA_Period)
{
//---- initial accumulation
for(i=0,k=pos;i<MA_Period;i++,k++)
{
sum+=Close[k];
//---- zero initial bars
ExtMapBuffer[k]=0;
}
}
else sum=ExtMapBuffer[pos+1]*(MA_Period-1)+Close[pos];
ExtMapBuffer[pos]=sum/MA_Period;
pos--;
}
}
//+------------------------------------------------------------------+
//| Linear Weighted Moving Average |
//+------------------------------------------------------------------+
void lwma()
{
double sum=0.0,lsum=0.0;
double price;
int i,weight=0,pos=Bars-ExtCountedBars-1;
//---- initial accumulation
if(pos<MA_Period) pos=MA_Period;
for(i=1;i<=MA_Period;i++,pos--)
{
price=Close[pos];
sum+=price*i;
lsum+=price;
weight+=i;
}
//---- main calculation loop
pos++;
i=pos+MA_Period;
while(pos>=0)
{
ExtMapBuffer[pos]=sum/weight;
if(pos==0) break;
pos--;
i--;
price=Close[pos];
sum=sum-lsum+price*MA_Period;
lsum-=Close[i];
lsum+=price;
}
//---- zero initial bars
if(ExtCountedBars<1)
for(i=1;i<MA_Period;i++) ExtMapBuffer[Bars-i]=0;
}
//+------------------------------------------------------------------+
Sample
Analysis
Market Information Used:
Series array that contains close prices for each bar
Indicator Curves created:
Implements a curve of type DRAW_LINE
Indicators Used:
Custom Indicators Used:
Order Management characteristics:
Other Features: