#property indicator_chart_window
#property indicator_buffers 5
#property indicator_color1 Green
#property indicator_color2 Green
#property indicator_color3 Green
#property indicator_color4 Blue
#property indicator_color5 Red
#property indicator_style1 STYLE_SOLID
#property indicator_style2 STYLE_SOLID
#property indicator_style3 STYLE_SOLID
#property indicator_style4 STYLE_SOLID
#property indicator_style5 STYLE_SOLID
#property indicator_width1 2
#property indicator_width2 2
#property indicator_width3 2
#property indicator_width4 2
#property indicator_width5 2

double BufUP[];
double BufCenter[];
double BufDOWN[];
double BufUP_Arrow[];
double BufDOWN_Arrow[];

extern int BB_Period = 20;

// 初期化関数
int init()
{
   SetIndexBuffer(0, BufUP);
   SetIndexBuffer(1, BufCenter);
   SetIndexBuffer(2, BufDOWN);
   SetIndexBuffer(3, BufUP_Arrow);
   SetIndexBuffer(4, BufDOWN_Arrow);
   	
	SetIndexStyle(3,DRAW_ARROW,STYLE_SOLID,2,Blue);
	SetIndexArrow(3,233);

	SetIndexStyle(4,DRAW_ARROW,STYLE_SOLID,2,Red);
	SetIndexArrow(4,234);
	
   return(0);
}

// 指標計算関数
int start()
{
	int counted_bar = IndicatorCounted();
	int limit = Bars-counted_bar;

	if(counted_bar == 0) limit -= BB_Period-1;
	for (int i = limit-1; i>=0; i--)
   {
      BufUP[i] = iBands(NULL,0,BB_Period,3,0,PRICE_CLOSE,1,i);
      BufCenter[i] = iBands(NULL,0,BB_Period,3,0,PRICE_CLOSE,0,i);
      BufDOWN[i] = iBands(NULL,0,BB_Period,3,0,PRICE_CLOSE,2,i);     
   }
   
	if(counted_bar == 0) limit -= 2;
	for (i = limit-1; i>=0; i--)
	{
   if(BufUP[i]<High[i]){
      BufDOWN_Arrow[i] = EMPTY_VALUE;
      BufDOWN_Arrow[i] = High[i]+30*Point;
   }
   if(BufDOWN[i]>Low[i]){
      BufUP_Arrow[i] = EMPTY_VALUE;
      BufUP_Arrow[i] = Low[i]-30*Point;
   }
   }

   return(0);
}