通达信主图上升通道支撑压力画线，上升通道显示。源码不加密，欢迎测试，方便自动画出上升通道
{上升通道支撑压力画线}
N:=20;
HH:=HHV(H,N);
LL:=LLV(L,N);
MID:=(HH+LL)/2;
UPPER:=MID+(HH-LL)*0.5;
LOWER:=MID-(HH-LL)*0.5;
DRAWLINE(H=HHV(H,N),H,REF(H=HHV(H,N),1),REF(H,1),1),COLORRED,LINETHICK2;
DRAWLINE(L=LLV(L,N),L,REF(L=LLV(L,N),1),REF(L,1),1),COLORGREEN,LINETHICK2;
DRAWKLINE(H,O,L,C);
DRAWTEXT(CURRBARSCOUNT=1,UPPER,' 压力'),COLORRED;
DRAWTEXT(CURRBARSCOUNT=1,LOWER,' 支撑'),COLORGREEN;
