主题：60分钟开盘价为啥输出的是 0 ？？？

VARIABLE: hh_60min=0, ll_60min=0,op_60min_l=0,cc_60min_l=0,hh_60min_l=0,ll_60min_l=0; 
VARIABLE: op_60min_ll=0,cc_60min_ll=0,hh_60min_ll=0,ll_60min_ll=0;

 op_60min_l=: CALLSTOCK(stklabel,vtOPEN,5,-1); 

cc_60min_l=:CALLSTOCK(stklabel,vtCLOSE,5,-1); 
 hh_60min_l=: CALLSTOCK(stklabel,vtHIGH,5,-1);

 ll_60min_l=: CALLSTOCK(stklabel,vtLOW,5,-1);

DRAWTEXT(1,CLOSE ,NUMTOSTR(op_60min_l,1)); 

=：这个是什么啊

这些全局变量 是启什么作用？

 op_60min_l: CALLSTOCK(stklabel,vtOPEN,5,-1); 

 cc_60min_l:CALLSTOCK(stklabel,vtCLOSE,5,-1); 

 hh_60min_l: CALLSTOCK(stklabel,vtHIGH,5,-1); 

 ll_60min_l: CALLSTOCK(stklabel,vtLOW,5,-1);

DRAWTEXT(1,CLOSE ,NUMTOSTR(op_60min_l,0));

这样不可以吗？