//+------------------------------------------------------------------+
//| StdDivBands.mq4 |
//| Copyright © 2006, Ronald Verwer @ Forex MetaSoft |
//| http://www.forexmetasoft.com |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2006, Ronald Verwer @ Forex MetaSoft"
#property link "http://www.forexmetasoft.com"
#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 Magenta
#property indicator_color2 Magenta
#property indicator_width1 2
#property indicator_width2 2
extern int StdDivPeriod = 20;
extern double StdDeviation = 2.0;
extern int Shift = 0;
extern int Applied_Price = 5;
double MiddleBuffer[];
double UpperBand[];
double LowerBand[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{
IndicatorBuffers(3);
SetIndexStyle(0,DRAW_LINE);
SetIndexBuffer(0,UpperBand);
SetIndexStyle(1,DRAW_LINE);
SetIndexBuffer(1,LowerBand);
SetIndexBuffer(2,MiddleBuffer);
SetIndexDrawBegin(0,StdDivPeriod+Shift);
SetIndexDrawBegin(1,StdDivPeriod+Shift);
SetIndexDrawBegin(2,StdDivPeriod+Shift);
return(0);
}
//+------------------------------------------------------------------+
//| Standard Deviation Bands |
//+------------------------------------------------------------------+
int start()
{
int i,k,counted_bars=IndicatorCounted();
double deviation;
double sum,oldval,newres;
if(Bars<=StdDivPeriod) return(0);
if(counted_bars<1)
for(i=1;i<=StdDivPeriod;i++)
{
MiddleBuffer[Bars-i]=EMPTY_VALUE;
UpperBand[Bars-i]=EMPTY_VALUE;
LowerBand[Bars-i]=EMPTY_VALUE;
}
int limit=Bars-counted_bars;
if(counted_bars>0) limit++;
for(i=0; i<limit; i++)
MiddleBuffer[i]=iMA(NULL,0,StdDivPeriod,Shift,MODE_SMA,Applied_Price,i);
i=Bars-StdDivPeriod+1;
if(counted_bars>StdDivPeriod-1) i=Bars-counted_bars-1;
while(i>=0)
{
sum=0.0;
k=i+StdDivPeriod-1;
oldval=MiddleBuffer[i];
while(k>=i)
{
newres=Close[k]-oldval;
sum+=newres*newres;
k--;
}
deviation=StdDeviation*MathSqrt(sum/StdDivPeriod);
UpperBand[i]=oldval+deviation;
LowerBand[i]=oldval-deviation;
i--;
}
return(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:
Moving average indicator
Custom Indicators Used:
Order Management characteristics:
Other Features: