主题：请教老师，如何设定提取不到变量的时候用第一根K线作为初始变量？

当前持仓:holding,colorgray,linethick0;
当前资产:asset,noaxis,colorgray;

if bj=0 and holding=0 and h>nh then begin
 buy(holding=0,1);
 bj:=1;
 sckd:=close;
end

if bj=0 and holding=0 and l<ml then begin
 buyshort(holding=0,1);
 bj:=1;
 sckk:=close;
end

//==============================
if high>nh and bj=1  then
begin
//平空开多
 sellshort(holding<0 and high>nh,0);
 if holding=0 then begin
  buy(holding=0 and high>sckd,1);
  sckd:=close;
 end
end