關于論壇中R-Break策略中全局變量的幾點疑問

作者：開拓者 TB 來源：cxh99.com 發布時間：2017年02月22日

咨詢內容： Params
Numeric notbef(9.00);
Numeric notaft(14.55);
Numeric f1(0.35);
Numeric f2(0.07);
Numeric f3(0.25);
Numeric reverse(1.00);
Numeric rangemin(0.2);
Numeric xdiv(3);

Vars
NumericSeries ssetup(0);
NumericSeries bsetup(0);
NumericSeries senter(0);
NumericSeries benter(0);
NumericSeries bbreak(0);
NumericSeries sbreak(0);
NumericSeries ltoday(0);
NumericSeries hitoday(9999);
NumericSeries startnow(0);
NumericSeries div(0);
BoolSeries rfilter(false);
Numeric i_reverse;
Numeric i_rangemin;
Numeric i_vB;
Numeric i_vS;

Begin
i_reverse = reverse*(OpenD(0)/100);
i_rangemin = rangemin*(OpenD(0)/100);
if(BarStatus==0)
{
      startnow=0;
      div=max(xdiv,1);
}

if(Date != Date[1])
{
      SetGlobalVar(0,0);
      SetGlobalVar(1,0);
      startnow=startnow+1;
      ssetup=hitoday[1]+f1*(Close[1]-ltoday[1]);
      senter=((1+f2)/2)*(hitoday[1]+Close[1])-(f2)*ltoday[1];
      benter=((1+f2)/2)*(ltoday[1]+Close[1])-(f2)*hitoday[1];
      bsetup=ltoday[1]-f1*(hitoday[1]-Close[1]);
      bbreak=ssetup+f3*(ssetup-bsetup);
      sbreak=bsetup-f3*(ssetup-bsetup);

      hitoday=High;
      ltoday=Low;

      rfilter=(hitoday[1]-ltoday[1])>=i_rangemin;
}

if(High>hitoday)
{
      hitoday=High;
}
if(Low<ltoday)
{
      ltoday=Low;
}
if(Time*100>=notbef and Time*100<notaft and startnow>=2 and rfilter)
{

   if(Time != GetGlobalVar(1) and GetGlobalVar(1) != 0)
      {
               SetGlobalVar(1,10000);
      }
      if(hitoday>=ssetup and marketposition>-1 and GetGlobalVar(1)<1)
      {
               If(Low<=(senter+(hitoday-ssetup)/div))
               {
                     SellShort(1,senter+(hitoday-ssetup)/div);
                     SetGlobalVar(1,Time);
                     Return;
               }
      }
      if(ltoday<=bsetup and marketposition<1  and GetGlobalVar(1)<1)
      {
               If(High>=(benter-(bsetup-ltoday)/div))
               {
                     Buy(1,benter-(bsetup-ltoday)/div);
                     SetGlobalVar(1,Time);
                     Return;
               }
      }

      if(marketposition==-1)
      {
               SetGlobalVar(0,1);
               if(High-EntryPrice>=i_reverse)
               {
                     BuyToCover(1,entryprice+i_reverse);
                     Return;
               }
      }
      if(marketposition==1)
      {
               SetGlobalVar(0,1);
               if(EntryPrice-Low>=i_reverse)
               {
                     Sell(1,entryprice-i_reverse);
                     Return;
               }
      }

      if(marketposition==0)
      {
               if(High>=bbreak and GetGlobalVar(0) == 0)
               {
                     Buy(1,bbreak);
                     Return;
               }
      }
      if(marketposition==0)
      {
               if(low<=sbreak  and GetGlobalVar(0) == 0)
               {
                     SellShort(1,sbreak);
                     Return;
               }
      }

}

if(Time*100>=notaft and Time<0.1600)
{

      if(marketposition==-1)
      {
               BuyToCover(1,Open);
      }
      if(marketposition==1)
      {
               Sell(1,Open);
      }

}
End
我想問下
ssetup=hitoday[1]+f1*(Close[1]-ltoday[1]);
      senter=((1+f2)/2)*(hitoday[1]+Close[1])-(f2)*ltoday[1];
      benter=((1+f2)/2)*(ltoday[1]+Close[1])-(f2)*hitoday[1];
      bsetup=ltoday[1]-f1*(hitoday[1]-Close[1]);
      bbreak=ssetup+f3*(ssetup-bsetup);
      sbreak=bsetup-f3*(ssetup-bsetup);
hitoday=High;
      ltoday=Low;
if(High>hitoday)
{
      hitoday=High;
}
if(Low<ltoday)
{
      ltoday=Low;
}
其中的hitoday和ltoday代表著什么是High和Low嗎？那為什么不直接替換掉，我替換掉了而六個變量的值也因此發生改變？
還有一個問題就是后面的兩個if循環，為什么hitoday和ltoday賦值后，還與low和high比較。兩者不是一樣的了嗎？我也試過，如果不加上這句，答案還是不一樣。
本人是菜鳥，不懂TB的一些關鍵的思想，請求大神解答。