//+------------------------------------------------------------------+
//| BolliTrigger.mq4 |
//| Copyright © 2005, DragonBonz Software |
//| http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2005, DragonBonz Software"
//#property link "http://www.metaquotes.net"
#property indicator_separate_window
#property indicator_buffers 4
#property indicator_color1 Red
#property indicator_color2 Blue
#property indicator_color3 Blue
#property indicator_color4 Green
extern int BollBandMovAvgPrd=13;
extern int BollBandMovAvgShift=0;
extern int BollBandMovAvgMethod=0;
extern double BollBandStdDev=2.0;
//
// set default values of horizonatal lines to Fib ratios
//
extern double TriggerLine = 0.236;
extern double AddLine = 0.382;
extern double ProfitLine = 0.5;
//
// Trigger weights for bandwidth and %B
//
extern int Bandwidth_Const = 110;
extern int PercentB_Const = 13;
double bbBandWidth;
//---- buffers
double ExtMapBuffer1[];
double ExtMapBuffer2[];
double ExtMapBuffer3[];
double ExtMapBuffer4[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int init()
{
//---- additional buffers are used for counting
IndicatorBuffers(5);
//---- indicators
SetIndexStyle(0,DRAW_LINE,STYLE_DOT);
SetIndexBuffer(0,ExtMapBuffer1);
SetIndexStyle(1,DRAW_LINE,STYLE_DOT);
SetIndexBuffer(1,ExtMapBuffer2);
SetIndexStyle(2,DRAW_LINE,STYLE_DOT);
SetIndexBuffer(2,ExtMapBuffer3);
SetIndexStyle(3,DRAW_LINE);
SetIndexBuffer(3,ExtMapBuffer4);
SetIndexDrawBegin( 2, BollBandMovAvgPrd );
IndicatorShortName("Bolli Trigger");
//----
return(0);
}
//+------------------------------------------------------------------+
//| Custor indicator deinitialization function |
//+------------------------------------------------------------------+
int deinit()
{
//----
//----
return(0);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function |
//+------------------------------------------------------------------+
int start()
{
int limit;
int counted_bars=IndicatorCounted();
//---- check for possible errors
if(counted_bars<0) return(-1);
//---- last counted bar will be recounted
if(counted_bars>0) counted_bars--;
limit=Bars-counted_bars;
//----
for(int i=0; i < limit; i++)
{
//
// calculate Bollinger Moving Average and upper and lower bands
//
double ma = iMA(NULL,0,BollBandMovAvgPrd,BollBandMovAvgShift,BollBandMovAvgMethod,PRICE_CLOSE,i);
double up = iBands( NULL,0,BollBandMovAvgPrd,BollBandStdDev,0,PRICE_CLOSE,MODE_UPPER,i);
double low = iBands( NULL,0,BollBandMovAvgPrd,BollBandStdDev,0,PRICE_CLOSE,MODE_LOWER,i);
double r = up - low; // range
double perB = 0; // default value for %B
if( r > 0 )
perB = (Close[i] - low)/r;
if( ma > 0 )
bbBandWidth = r/ma;
else
bbBandWidth = 0;
ExtMapBuffer1[i] = TriggerLine;
ExtMapBuffer2[i] = AddLine;
ExtMapBuffer3[i] = ProfitLine;
//
// signal line
//
// this line is the weighted sum of bandwidth and a modified %B
//
// bandwidth gives us a relative size of bollinger bands.
// Increasing Bandwidth_Const will smooth out signal, decreasing Bandwidth_Const makes
// it more volatile
//
// %B gives us a value of 1.0 at upperband, 0.5 at middle( moving avg ), and 0.0 at lower band
// we take the absolute value of 0.5 - %B to get a value that ranges from 0 to 1.0+
// this gives us a boost as bolli bands expand and can be used to speed or slow down
// the trigger by decreasing PercentB_Const to speed up( since it on bottom, it gives a
// greater weight when decreased), or increase PercentB_Const to slow down
ExtMapBuffer4[i] = ( bbBandWidth*Bandwidth_Const ) + MathAbs((0.5-perB)/PercentB_Const);
}
//----
return(0);
}
//+------------------------------------------------------------------+
Sample
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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
Bollinger bands indicator
Custom Indicators Used:
Order Management characteristics:
Other Features: