SFF:=H/REF(H,1)<1 AND REF(h,1)/REF(h,2)<1 AND L/REF(L,1)>1 and REF(L,1)/REF(L,2)>1 ;
STICKLINE(BACKSET(SFF,3),C,O,7,1),COLORYELLOW;
DRAWTEXT(SFF,L*0.97,'大鲨鱼'),COLORYELLOW;
w:=barslast(FILTER(BACKSET(SFF,3),3));
预警:cross(c,ref(h,w))LINETHICK0;
DRAWLINE(FILTER(BACKSET(SFF,3),3),h,cross(c,ref(h,w)),ref(h,w),0);