//+------------------------------------------------------------------+
//| BB-HL.mq4 |
//| Copyright © 2005, David W. Thomas |
//| mailto:davidwt@usa.net |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2005, David W. Thomas"
#property link "mailto:davidwt@usa.net"
//----
#property indicator_chart_window
#property indicator_buffers 3
#property indicator_color1 MediumSeaGreen
#property indicator_color2 MediumSeaGreen
#property indicator_color3 MediumSeaGreen
//---- input parameters
extern int Per=20;
extern double nDev=2.0;
//---- buffers
double MABuffer[];
double UpperBandBuffer[];
double LowerBandBuffer[];
double DevsBuffer[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{
IndicatorBuffers(4);
//---- indicators
SetIndexStyle(0,DRAW_LINE);
SetIndexBuffer(0,MABuffer);
SetIndexDrawBegin(0,Per);
SetIndexEmptyValue(0, 0.0);
SetIndexStyle(1,DRAW_LINE);
SetIndexBuffer(1,UpperBandBuffer);
SetIndexDrawBegin(1,2*Per);
SetIndexEmptyValue(1, 0.0);
SetIndexStyle(2,DRAW_LINE);
SetIndexBuffer(2,LowerBandBuffer);
SetIndexDrawBegin(2,2*Per);
SetIndexEmptyValue(2, 0.0);
SetIndexBuffer(3,DevsBuffer);
//----
string short_name="BB-HL(" + Per + "," + DoubleToStr(nDev, 1) + ")";
IndicatorShortName(short_name);
return(0);
}
//+------------------------------------------------------------------+
//| Custor indicator deinitialization function |
//+------------------------------------------------------------------+
int deinit()
{
//----
//----
return(0);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function |
//+------------------------------------------------------------------+
int start()
{
int limit;
int counted_bars=IndicatorCounted();
double d1, d2, ma;
//---- last counted bar will be recounted
if (counted_bars>0) counted_bars--;
limit=Bars - counted_bars;
//---- simple moving average and deviations
for(int i=limit; i>=0; i--)
{
ma=iMA(NULL, 0, Per, 0, MODE_SMA, PRICE_MEDIAN, i);
d1=High[i] - ma;
d1*=d1;
d2=Low[i] - ma;
d2*=d2;
MABuffer[i]=ma;
DevsBuffer[i]=MathMax(d1, d2);
}
//---- compute the bands
UpperBandBuffer[limit]=0.0;
LowerBandBuffer[limit]=0.0;
for(i=limit; i>=0; i--)
{
d1=0;
for(int j=i; j<i+Per; j++)
d1+=DevsBuffer[j];
d1/=Per;
d2=nDev * MathSqrt(d1);
ma=MABuffer[i];
UpperBandBuffer[i]=ma + d2;
LowerBandBuffer[i]=ma - d2;
}
return(0);
}
//+------------------------------------------------------------------+
Sample
Analysis
Market Information Used:
Series array that contains the highest prices of each bar
Series array that contains the lowest prices of 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: