关于MACD背离作业，请牛版主批改，还有几个问题，谢谢！

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 //+------------------------------------------------------------------+
 //| MACD_beili.mq4 Ver. 1.0 |
 //| MACD背离指标（按最高最低价计算）。 |
 //| Henry Zhao |
 //| shinetrip@yahoo.com |
 //| Feb. 19, 2007 |
 //+------------------------------------------------------------------+
 
 #property copyright Henry Zhao
 #property indicator_chart_window
 #property indicator_buffers 3
 #property indicator_color1 Cyan
 #property indicator_color2 Magenta
 #property indicator_color3 Black
 
 extern int method = 1;
 extern int bars_compared = 15; // 在多少个bar中寻找第二个峰值
 extern int number_of_bars = 1000;
 
 //---- buffers
 double ExtMapBuffer1[];
 double ExtMapBuffer2[];
 double ExtMapBuffer3[];
 
 
 //+------------------------------------------------------------------+
 //| 指标初始化代码 |
 //+------------------------------------------------------------------+
 int init(){
 //SetIndexStyle(0,DRAW_ARROW); // RSI背离信号用箭头表示
 SetIndexStyle(0,DRAW_NONE); // RSI背离信号用箭头表示
 SetIndexBuffer(0,ExtMapBuffer1);
 SetIndexArrow(0,233);
 //SetIndexStyle(1,DRAW_ARROW);
 SetIndexStyle(1,DRAW_NONE);
 SetIndexBuffer(1,ExtMapBuffer2);
 SetIndexArrow(1,234);
 
 SetIndexStyle(2,DRAW_ARROW,EMPTY,4); // 阶段高/低点用黑色点表示
 SetIndexBuffer(2,ExtMapBuffer3);
 SetIndexArrow(2,159);
 
 return(0);
 }
 
 
 //+------------------------------------------------------------------+
 //| 指标反初始化代码 |
 //+------------------------------------------------------------------+
 int deinit(){
 
 return(0);
 }
 
 
 //+------------------------------------------------------------------+
 //| 计算显示指标的条件 |
 //+------------------------------------------------------------------+
 int start(){
 int i, m, shift, bar1, bar2;
 double pos_adjust, low1, low2, high1, high2, v1, v2;
 
 pos_adjust = 100*Point; // 根据不同的时间框架确定信号显示的位置。主要是为了美观
 if(Period()==1) pos_adjust = 1*Point;
 if(Period()==5) pos_adjust = 3*Point;
 if(Period()==15) pos_adjust = 8*Point;
 if(Period()==30) pos_adjust = 10*Point;
 if(Period()==60) pos_adjust = 13*Point;
 if(Period()==240) pos_adjust = 20*Point;
 if(Period()==1440) pos_adjust = 50*Point;
 
 shift=Bars;
 if( shift number_of_bars ) shift = number_of_bars;//只计数1000个k线
 
 for( i=shift-2*bars_compared; i i--)//i从第970条至第0根K线（包括第0根k线）开始从左向右循环计算，（为何要从第970根k线开始计算？从第1000根k线不行么？）
 {
 low1 = 0;
 if( Low[i+2]High[i+3]){
 bar1=i+2;
 high1 = High[bar1];
 } // 最高点必须是前三条已完成bar的中间那一条
 
 high2 = 0;
 if(method==1){
 bar2 = iHighest(NULL, 0, MODE_HIGH, bars_compared, i+4);
 if( bar2 != i+4 bar2 != i+4 +bars_compared-1 ) high2 = High[bar2];
 }
 if(method==2){
 bar2 = iHighest(NULL, 0, MODE_HIGH, bars_compared, i+bars_compared);
 if( bar2 != i+bars_compared bar2 != i + 2*bars_compared-1 ) high2 = High[bar2];
 }
 
 if( high1!=0 high2!=0 high1 high2){
 v1 = iMACD( NULL, 0, 12, 26, 9, PRICE_CLOSE, MODE_MAIN, bar1);
 v2 = iMACD( NULL, 0, 12, 26, 9, PRICE_CLOSE, MODE_MAIN, bar2);
 if( v1 v2 ){ ExtMapBuffer2 i = High i + pos_adjust;
 ExtMapBuffer3[bar1] = High[bar1] + pos_adjust*0.3;
 ExtMapBuffer3[bar2] = High[bar2] + pos_adjust*0.3;
 }
 }
 
 } // end of for(i)
 
 return(0);
 }
 //+------------------------------------------------------------------+[/td][/tr]
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