//+------------------------------------------------------------------+
//| Snake.mq4 |
//| "ÈÍÄÈÊÀÒÎÐÛ ÄËß ÑÀÌÎÎÁÌÀÍÀ" |
//| Bookkeeper, 2006, yuzefovich@gmail.com |
//+------------------------------------------------------------------+
#property copyright ""
#property link ""
//----
#property indicator_chart_window
#property indicator_buffers 1
#property indicator_color1 Yellow
//----
extern int Snake_HalfCycle=5; // Snake_HalfCycle = 4...10 or other
//----
double Snake_Buffer[];
double Snake_Sum, Snake_Weight, Snake_Sum_Minus, Snake_Sum_Plus;
int Snake_FullCycle;
//----
int init()
{
int draw_begin;
Snake_FullCycle=Snake_HalfCycle*2+1;
draw_begin=Snake_FullCycle+1;
SetIndexDrawBegin(0,draw_begin);
SetIndexBuffer(0,Snake_Buffer);
SetIndexStyle(0,DRAW_LINE);
return(0);
}
//----
int start()
{
int FirstPos, ExtCountedBars=0;
if(Bars<=150) return(0);
if(Snake_HalfCycle<3) Snake_HalfCycle=3;
ExtCountedBars=IndicatorCounted();
if (ExtCountedBars<0) return(-1);
if (ExtCountedBars>0) ExtCountedBars--;
FirstPos=Bars-ExtCountedBars-1;
if(FirstPos>Bars-Snake_HalfCycle-1) FirstPos=Bars-Snake_HalfCycle-1;
Snake(FirstPos);
return(0);
}
//----
void Snake(int Pos)
{
int i;
if(Pos<=Snake_HalfCycle+1) Pos=Snake_HalfCycle+2;
Snake_Buffer[Pos]=SnakeFirstCalc(Pos);
Pos--;
while(Pos>=Snake_HalfCycle)
{
Snake_Buffer[Pos]=SnakeNextCalc(Pos);
Pos--;
}
while(Pos>0)
{
Snake_Buffer[Pos]=SnakeFirstCalc(Pos);
Pos--;
}
if(Pos==0)
Snake_Buffer[0]=iMA(NULL,0,Snake_HalfCycle,0,MODE_LWMA,PRICE_TYPICAL,0);
return;
}
//----
double SnakePrice(int Shift)
{
return((2*Close[Shift]+High[Shift]+Low[Shift])/4);
}
//----
double SnakeFirstCalc(int Shift)
{
int i, j, w;
Snake_Sum=0.0;
Snake_Weight=0.0;
if(Shift<Snake_HalfCycle)
{
i=0;
w=Shift+Snake_HalfCycle;
while(w>=Shift)
{
i++;
Snake_Sum=Snake_Sum+i*SnakePrice(w);
Snake_Weight=Snake_Weight+i;
w--;
}
while(w>=0)
{
i--;
Snake_Sum=Snake_Sum+i*SnakePrice(w);
Snake_Weight=Snake_Weight+i;
w--;
}
}
else
{
Snake_Sum_Minus=0.0;
Snake_Sum_Plus=0.0;
for(j=Shift-Snake_HalfCycle,i=Shift+Snake_HalfCycle,w=1;
w<= Snake_HalfCycle;
j++,i--,w++)
{
Snake_Sum=Snake_Sum+w*(SnakePrice(i)+SnakePrice(j));
Snake_Weight=Snake_Weight+2*w;
Snake_Sum_Minus=Snake_Sum_Minus+SnakePrice(i);
Snake_Sum_Plus=Snake_Sum_Plus+SnakePrice(j);
}
Snake_Sum=Snake_Sum+( Snake_HalfCycle+1)*SnakePrice(Shift);
Snake_Weight=Snake_Weight+ Snake_HalfCycle+1;
Snake_Sum_Minus=Snake_Sum_Minus+SnakePrice(Shift);
}
return(Snake_Sum/ Snake_Weight);
}
//----
double SnakeNextCalc(int Shift)
{
Snake_Sum_Plus=Snake_Sum_Plus+SnakePrice(Shift-Snake_HalfCycle);
Snake_Sum=Snake_Sum-Snake_Sum_Minus+Snake_Sum_Plus;
Snake_Sum_Minus=Snake_Sum_Minus-SnakePrice(Shift+Snake_HalfCycle+1)+SnakePrice(Shift);
Snake_Sum_Plus=Snake_Sum_Plus-SnakePrice(Shift);
return(Snake_Sum/Snake_Weight);
}
//----
Sample
Analysis
Market Information Used:
Series array that contains close prices for each bar
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: