实时获取报价自定义指标为何不能实时刷新,恳请高手看看

各位高手,老师,在网上苦苦寻得一段输出商品报价的指标..但不知为何只能在载入时输出一次,并不能实时输出..(输出文件在MT4的FILE文件中),能否帮改下或是需要如何设置MT4软件才能达到自定义指标实时刷新吗?　谢谢各位..代码如下:
#include
#property indicator_chart_window
int last_write_period=0;
extern int MAX_ROWS = 3000;
extern string START_DATE = "2008-1-1";
int init() {
  writelog();
  return (0);
}
int writelog() {
  int i, cnt, hlog, tm;
  string date = Symbol();
      date = StringSubstr(date, 0, 1)+StringSubstr(date, 3, 1);
  string hour = Symbol();
      hour = StringSubstr(hour, 0, 1)+StringSubstr(hour, 3, 1);
  string fname = date+"_";
  cnt = Period();
  if (cnt==PERIOD_M1) fname = fname+"M1.txt";
  if (cnt==PERIOD_M5) fname = fname+"M5.txt";
  if (cnt==PERIOD_M15) fname = fname+"M15.txt";
  if (cnt==PERIOD_M30) fname = fname+"M30.txt";
  if (cnt==PERIOD_H1) fname = fname+"H1.txt";
  if (cnt==PERIOD_H4) fname = fname+"H4.txt";
  if (cnt==PERIOD_D1) fname = fname+"D1.txt";
  if (cnt==PERIOD_W1) fname = fname+"W1.txt";
  if (cnt==PERIOD_MN1) fname = fname+"MN.txt";

  cnt = CurTime() / (cnt*60);
  if (cnt!=last_write_period) {
  hlog = FileOpen(fname, FILE_CSV | FILE_WRITE, " ");
  if (hlog=0; i--) {
  tm = Time[i];
  date = TimeToStr(tm, TIME_DATE);
  hour=TimeToStr(tm, TIME_MINUTES);
  //s output eg:2011.08.2519:00
date= StringSubstr(date,0,4)+"/"+StringSubstr(date,5,2)+"/"+StringSubstr(date,8,2);
  if (Open[i]!=0 && High[i]!=0) {
            FileWrite(hlog, date, hour,Open[i], High[i], Low[i], Close[i]);
         }
  }

  FileClose(hlog);
  last_write_period = cnt;
  Print("输出GET数据文件成功.");
  Comment(TimeToStr(CurTime(), TIME_DATE), " ", TimeToStr(CurTime(), TIME_MINUTES), "：输出GET数据文件成功.");

  }
  return (0);
}
int start() {
  return ( writelog() );

}

你这个函数是放在加载函数里面，只有指标或者EA刚才加载在盘面时运行一次，你可以把  writelog(); 在OnStart 或者 OnTick（）函数里面运行。

有用EA赚着钱的吗？

感谢，谢谢；感谢，谢谢