AA:MA(C,5),LINETHICK2,COLORWHITE;BB:MA(C,21),COLORMAGENTA,LINETHICK2;IF(AA>=BB,AA,DRAWNULL),COLORRED,LINETHICK2;IF(AADRAWTEXT(CROSS(AA,BB),AA*0.97,'B'),COLORYELLOW;DRAWTEXT(CROSS(BB,AA),AA*1.03,'S'),COLORYELLOW; 怎么用exp呢，不懂
