标题：修改模型

pkkd:ref(CROSS(ZIG(3,10),REF(ZIG(3,10),1)),1);   //平空开多条件
pdkk:ref(CROSS(REF(ZIG(3,10),1),ZIG(3,10)),1);  //平多开空条件

if pkkd then
  begin 
  sellshort(holding<0,holding,market);
  buy(holding=0,1,market);
  end
  
if pdkk then
  begin 
  sell(holding>0,holding,market);
  buyshort(holding=0,1,market);
  end
  
if holding>0 and c<ref(low,enterbars+1) then      //多头止损
  sell(1,holding,market);
  
if holding<0 and c>ref(high,enterbars+1) then     //空头止损
  sellshort(1,holding,market);