[求助]画线问题怎么解决？谢谢！　[通达信]

Q1:=BACKSET(CR2,HHVBARS(H,T1)+1);
Q2:=BACKSET(CR1,LLVBARS(L,T2)+1);
DRAWLINE(CROSS(Q1,0.5),H,CROSS(Q2,0.5),L,0),COLORBROWN;
DRAWLINE(CROSS(Q2,0.5),L,CROSS(Q1,0.5),H,0),COLORFF55BB;
AA:=BACKSET(ISLASTBAR && Y4<X4,REF(HHVBARS(H,T1),T2)+1+T2);
BB:=BACKSET(ISLASTBAR && Y4<X4,LLVBARS(L,T2)+1);
DRAWLINE(CROSS(AA,0.5),H,CROSS(BB,0.5),L,0),COLORGREEN;
CC:=BACKSET(ISLASTBAR && Y4>X4,REF(LLVBARS(L,T2),T1)+1+T1);
DD:=BACKSET(ISLASTBAR && Y4>X4,HHVBARS(H,T1)+1);
DRAWLINE(CROSS(CC,0.5),L,CROSS(DD,0.5),H,0),COLORRED;

这样的画线看起来很不舒服，现在我只是要求系统在50个周期内显示这些画线，怎么解决？谢谢您！