{王子灯塔线2012-04-12,通达信,可以加到你的主图公式,只适用于上证指数}

年月:= YEAR=2012 AND MONTH=04; 日0412:=年月 AND DAY=12; 日0413:=年月 AND DAY=13; 日0417:=年月 AND DAY=17;
 {画线并显示当值}{} 平: REF(C,BARSLAST(日0412)),COLORWHITE;{水平线} A: DRAWLINE(日0412,C,日0413,C,1),COLORMAGENTA;{灯塔线A}; B: DRAWLINE(日0412,C,日0417,H,1),COLORYELLOW; {灯塔线B}; C_: DRAWLINE(日0412,C,日0417,L,1),COLORGREEN; {灯塔线C};
 DRAWTEXT(ISLASTBAR,平,"平"),COLORWHITE; DRAWTEXT(ISLASTBAR,A+15,"A"),COLORLIRED; DRAWTEXT(ISLASTBAR,B,"B"),COLORYELLOW; DRAWTEXT(ISLASTBAR,C_,"C"),COLORGREEN;