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| Alligator |
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| Alligator |
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| Alligator |
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| Alligator-How to trade |
Market indicator - Alligator consists of three lines, overlaid on a pricing chart, that represent the jaw, the teeth and the lips of the beast, and was created to help the trader confirm the presence of a trend and its direction. The Alligator indicator can also help traders designate impulse and corrective wave formations.
The “traits” of the Alligator are numerous. If the three lines are entwined, then the Alligator’s mouth is closed and he is said to be sleeping. As he sleeps, he gets hungrier by the minute, waiting for a breakout from his slumber when he will eat. When the trend takes shape, the Alligator wakes and starts eating. Once satiated, the Alligator closes his mouth once again and goes to sleep.
This is a very good indicator for determining the trend.
Matematik formula:
1) 13 SMA shift 8 Blue color – called Alligator’s Jaw
2) 8 SMA shift 5 Red color – called Alligator’s Teeth
3) 5 SMA shift 3 Green color – called Alligator’s Lips
Alligator MQ4 Code Base (Copy Code)
//+-------------------------------------------------------------------+
//| Alligator.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 3
#property indicator_color1 Blue
#property indicator_color2 Red
#property indicator_color3 Lime
//---- input parameters
extern int JawsPeriod=13;
extern int JawsShift=8;
extern int TeethPeriod=8;
extern int TeethShift=5;
extern int LipsPeriod=5;
extern int LipsShift=3;
//---- indicator buffers
double ExtBlueBuffer[];
double ExtRedBuffer[];
double ExtLimeBuffer[];
//+-------------------------------------------------------------------+
//| Custom indicator initialization function |
//+-------------------------------------------------------------------+
int init()
{
//---- line shifts when drawing
SetIndexShift(0,JawsShift);
SetIndexShift(1,TeethShift);
SetIndexShift(2,LipsShift);
//---- first positions skipped when drawing
SetIndexDrawBegin(0,JawsPeriod-1);
SetIndexDrawBegin(1,TeethPeriod-1);
SetIndexDrawBegin(2,LipsPeriod-1);
//---- 3 indicator buffers mapping
SetIndexBuffer(0,ExtBlueBuffer);
SetIndexBuffer(1,ExtRedBuffer);
SetIndexBuffer(2,ExtLimeBuffer);
//---- drawing settings
SetIndexStyle(0,DRAW_LINE);
SetIndexStyle(1,DRAW_LINE);
SetIndexStyle(2,DRAW_LINE);
//---- index labels
SetIndexLabel(0,"Gator Jaws");
SetIndexLabel(1,"Gator Teeth");
SetIndexLabel(2,"Gator Lips");
//---- initialization done
return(0);
}
//+-------------------------------------------------------------------+
//| Bill Williams' Alligator |
//+-------------------------------------------------------------------+
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;
//---- main loop
for(int i=0; i<limit; i++)
{
//---- ma_shift set to 0 because SetIndexShift called abowe
ExtBlueBuffer[i]=iMA(NULL,0,JawsPeriod,0,MODE_SMMA,PRICE_MEDIAN,i);
ExtRedBuffer[i]=iMA(NULL,0,TeethPeriod,0,MODE_SMMA,PRICE_MEDIAN,i);
ExtLimeBuffer[i]=iMA(NULL,0,LipsPeriod,0,MODE_SMMA,PRICE_MEDIAN,i);
}
//---- done
return(0);
}
//+-------------------------------------------------------------------+
Alligator MQ5 Code Base (Copy Code)
//+-------------------------------------------------------------------+
//| Alligator.mq5 |
//| Copyright 2009, MetaQuotes Software Corp. |
//| http://www.mql5.com |
//+-------------------------------------------------------------------+
#property copyright "2009, MetaQuotes Software Corp."
#property link "http://www.mql5.com"
//---- indicator settings
#property indicator_chart_window
#property indicator_buffers 3
#property indicator_plots 3
#property indicator_type1 DRAW_LINE
#property indicator_type2 DRAW_LINE
#property indicator_type3 DRAW_LINE
#property indicator_color1 Blue
#property indicator_color2 Red
#property indicator_color3 Lime
#property indicator_width1 1
#property indicator_width2 1
#property indicator_width3 1
#property indicator_label1 "Jaws"
#property indicator_label2 "Teeth"
#property indicator_label3 "Lips"
//---- input parameters
input int InpJawsPeriod=13; // Jaws period
input int InpJawsShift=8; // Jaws shift
input int InpTeethPeriod=8; // Teeth period
input int InpTeethShift=5; // Teeth shift
input int InpLipsPeriod=5; // Lips period
input int InpLipsShift=3; // Lips shift
input ENUM_MA_METHOD InpMAMethod=MODE_SMMA; // Moving average method
input ENUM_APPLIED_PRICE InpAppliedPrice=PRICE_MEDIAN; // Applied price
//---- indicator buffers
double ExtJaws[];
double ExtTeeth[];
double ExtLips[];
//---- handles for moving averages
int ExtJawsHandle;
int ExtTeethHandle;
int ExtLipsHandle;
//--- bars minimum for calculation
int ExtBarsMinimum;
//+-------------------------------------------------------------------+
//| Custom indicator initialization function |
//+-------------------------------------------------------------------+
void OnInit()
{
//---- indicator buffers mapping
SetIndexBuffer(0,ExtJaws,INDICATOR_DATA);
SetIndexBuffer(1,ExtTeeth,INDICATOR_DATA);
SetIndexBuffer(2,ExtLips,INDICATOR_DATA);
//--- set accuracy
IndicatorSetInteger(INDICATOR_DIGITS,_Digits);
//---- sets first bar from what index will be drawn
PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,InpJawsPeriod-1);
PlotIndexSetInteger(1,PLOT_DRAW_BEGIN,InpTeethPeriod-1);
PlotIndexSetInteger(2,PLOT_DRAW_BEGIN,InpLipsPeriod-1);
//---- line shifts when drawing
PlotIndexSetInteger(0,PLOT_SHIFT,InpJawsShift);
PlotIndexSetInteger(1,PLOT_SHIFT,InpTeethShift);
PlotIndexSetInteger(2,PLOT_SHIFT,InpLipsShift);
//---- name for DataWindow
PlotIndexSetString(0,PLOT_LABEL,"Jaws("+string(InpJawsPeriod)+")");
PlotIndexSetString(1,PLOT_LABEL,"Teeth("+string(InpTeethPeriod)+")");
PlotIndexSetString(2,PLOT_LABEL,"Lips("+string(InpLipsPeriod)+")");
//--- get MA's handles
ExtJawsHandle=iMA(NULL,0,InpJawsPeriod,0,InpMAMethod,InpAppliedPrice);
ExtTeethHandle=iMA(NULL,0,InpTeethPeriod,0,InpMAMethod,InpAppliedPrice);
ExtLipsHandle=iMA(NULL,0,InpLipsPeriod,0,InpMAMethod,InpAppliedPrice);
//--- bars minimum for calculation
ExtBarsMinimum=InpJawsPeriod+InpJawsShift;
if(ExtBarsMinimum<(InpTeethPeriod+InpTeethShift))
ExtBarsMinimum=InpTeethPeriod+InpTeethShift;
if(ExtBarsMinimum<(InpLipsPeriod+InpLipsPeriod))
ExtBarsMinimum=InpLipsPeriod+InpLipsPeriod;
//--- initialization done
}
//+-------------------------------------------------------------------+
//| Alligator OnCalculate function |
//+-------------------------------------------------------------------+
int OnCalculate(const int rates_total,
const int prev_calculated,
const datetime &Time[],
const double &Open[],
const double &High[],
const double &Low[],
const double &Close[],
const long &TickVolume[],
const long &Volume[],
const int &Spread[])
{
//--- check for rates total
if(rates_total<ExtBarsMinimum)
return(0); // not enough bars for calculation
//--- not all data may be calculated
int calculated=BarsCalculated(ExtJawsHandle);
if(calculated<rates_total)
{
Print("Not all data of ExtJawsHandle is calculated (",calculated,"bars ). Error",GetLastError());
return(0);
}
calculated=BarsCalculated(ExtTeethHandle);
if(calculated<rates_total)
{
Print("Not all data of ExtTeethHandle is calculated (",calculated,"bars ). Error",GetLastError());
return(0);
}
calculated=BarsCalculated(ExtLipsHandle);
if(calculated<rates_total)
{
Print("Not all data of ExtLipsHandle is calculated (",calculated,"bars ). Error",GetLastError());
return(0);
}
//--- we can copy not all data
int to_copy;
if(prev_calculated>rates_total || prev_calculated<0) to_copy=rates_total;
else
{
to_copy=rates_total-prev_calculated;
if(prev_calculated>0) to_copy++;
}
//---- get ma buffers
if(IsStopped()) return(0); //Checking for stop flag
if(CopyBuffer(ExtJawsHandle,0,0,to_copy,ExtJaws)<=0)
{
Print("getting ExtJawsHandle is failed! Error",GetLastError());
return(0);
}
if(IsStopped()) return(0); //Checking for stop flag
if(CopyBuffer(ExtTeethHandle,0,0,to_copy,ExtTeeth)<=0)
{
Print("getting ExtTeethHandle is failed! Error",GetLastError());
return(0);
}
if(IsStopped()) return(0); //Checking for stop flag
if(CopyBuffer(ExtLipsHandle,0,0,to_copy,ExtLips)<=0)
{
Print("getting ExtLipsHandle is failed! Error",GetLastError());
return(0);
}
//--- return value of prev_calculated for next call
return(rates_total);
}
//+-------------------------------------------------------------------+
