主题：函数问题

//最小变动价位：
zx:DYNAINFO(208),LINETHICK0;
//zx是最小变动价位，实际中为2个，除以2再乘以y，则可以实现y为最小一个变动价位。
n:=(zx/2)*y;
    DK:=ZIG(4,n/10),LINETHICK2;
    hk:=VALUEWHEN(dk<=ref(dk,1) and ref(DK,1)>REF(DK,2),REF(DK,1)*(1-N/1000)-0.0001);
    Lk:=VALUEWHEN(dk>=ref(dk,1) and ref(DK,1)<REF(DK,2),REF(DK,1)*(1+N/1000)+0.0001);
    HD:IF(DK<=ref(DK,1) AND DK>HK,HK,DK),LINETHICK2,COLORGREEN;
    LD:iF(DK>=REF(DK,1) AND DK<LK,LK,DK),LINETHICK2,COLORRED;
    {买开，卖开条件}
    MC1:=IF(DK>=REF(DK,1) AND REF(DK,1)<REF(DK,2) AND l>LK,1,0);
    MC2:=IF(DK>=REF(DK,1) AND CROSS(l,LK),1,0);
  
    MR1:=IF(DK<=REF(DK,1) AND REF(DK,1)>REF(DK,2) AND h<HK,1,0);
    MR2:=IF(DK<=REF(DK,1) AND CROSS(HK,h),1,0);
   {买入卖出条件}
    Mc:=if(MC1=1 OR MC2=1,1,0);
    Mr:=IF(MR1=1 OR MR2=1,1,0);
     pd:=MR;//平多条件 
    kd:=MC;//开多条件
    PK:=Mc;//开空条件
    KK:=Mr;//平空条件

//以下为平仓反手时的语法，先开多，后平空；
//注意，用  LIMITR语句仍未下一个开盘成交，用limit怎么样？
if kd then
 begin
 sellshort(holding<0,0,MARKET);
 buy(holding=0 and kd ,1,MARKET);
 end
if kk then
 begin
 sell(holding>0,0,MARKET);
 buyshort(holding=0 and kk,1,MARKET);
 end