B是自定义变量，怎么转写为果仁指标，写了半天不能通过

支撑：IF(B>=0,REF(EMA(C,14),BARSLAST(CROSS(B,0))+1),DRAWNULL),colorblue,LINETHICK2;

阻力：lF(B<0,REF(EMA(C,14),BARSLAST(CROSS(0,B))+1),DRAWNULL),colorgreen,LINETHICK2;