21均线为趋势线，趋势向上才出现图标

编写要求：

如题: 请老师帮忙 能否在一下基础上加上 以21均线为趋势线，趋势向上才出现图标 XG1:=CROSS(C,MA(CLOSE,5)); DRAWICON(XG1,L*0.98,9); XG2:=CROSS(C,MA(CLOSE,13)); DRAWICON(XG2,L*0.98,1);

解答：

?XG1:=CROSS(C,MA(CLOSE,5)) AND NDAY(MA(C,21),REF(MA(C,21),1),2);

DRAWICON(XG1,L*0.98,9);