日:=200;
昨前:=7;
高1:=REF(HHV(H,日),昨前);
低1:=REF(LLV(L,日),昨前);
H1:=高1-(高1-低1)*0.5;
AA:=REFDATE(低1,DATE),COLORRED;
SS:C>=AA AND L<=AA;
DRAWBAND(SS,RGB(255,0,255),0,RGB(0,0,0));
DRAWTEXT(SS,0.6, ' 背线一战'),COLORYELLOW;
DRAWTEXT_FIX(1,0.02,1,0,'信号出现时股价在底线位置,操作性强 '),COLORFFDD44;
