【解説】 Alligator (ワニ): トレンドの転換を判断に使用。 3つの期間の異なる移動平均を使用し, この3本の線の乖離に注目し、 乖離していればしているほどトレンドが強い事を意味します。
短期ライン（緑）＝ワニの唇 (Lips)、
中期ライン（赤）＝ワニの歯 (Teeth)、
長期ライン（青）＝ワニの顎 (Jaws)
とこの3本のラインをワニにたとえる.
【シグナル】
ラインが重なっているところが眠っているところ、 ずれているところを口が開いているように見立てています。 口のあけ始めで売買し、 口が閉じて再び眠るところで取引を終了すると良いとされています。
さらに移動平均がクロスしているところが売買シグナルである。
//+------------------------------------------------------------------+
//| 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(CopyBuffer(ExtJawsHandle,0,0,to_copy,ExtJaws)＜=0)
{
Print("getting ExtJawsHandle is failed! Error",GetLastError());
return(0);
}
if(CopyBuffer(ExtTeethHandle,0,0,to_copy,ExtTeeth)＜=0)
{
Print("getting ExtTeethHandle is failed! Error",GetLastError());
return(0);
}
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);
}
//+------------------------------------------------------------------+
【表示結果】
青：長期ライン、赤：中期ライン、緑：短期ライン
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