卖线

​○卖线:EMA(SLOPE(C,21)*21+C,42),COLORRED,LINETHICK2; 

IF(卖线>=REF(卖线,1),卖线,DRAWNULL),COLORBLUE,LINETHICK2; 

IF(卖线<REF(卖线,1),卖线,DRAWNULL),COLORYELLOW,LINETHICK2;