老师您好，麻烦你帮我看看这段代码为什么不能在金字塔的K线上显示连线呢？
predayhigh:=callstock(stklabel,vthigh,6,-1);//昨日最高价
predaylow:=callstock(stklabel,vtlow,6,-1);//昨日最低价
predayclose:=callstock(stklabel,vtclose,6,-1);//昨日收盘价
predayopen:=callstock(stklabel,vtopen,6,-1);//昨天开盘价
波动率一:=(predayopen-predayclose);
波动率二:=(predayhigh-predaylow);
aa:波动率一,noaxis,colorred,LINETHICK3;
bb:波动率二,noaxis,COLORgreen,LINETHICK3;
怎样修改才能在金字塔上显示呢