布林中线:ma(CLOSE,20),NODRAW;布林上线:布林中线+2*STD(CLOSE,20) COLORCYAN;布林下线:布林中线-2*STD(CLOSE,20) COLORWHITE;IF(布林中线>REF(布林中线,1),布林中线,DRAWNULL),COLORRED,LINETHICK2;IF(布林中线<REF(布林中线,1),布林中线,DRAWNULL),COLORBROWN,DOTLINE,LINETHICK1;