参考：
买线:=EMA(C,2);
卖线:=EMA(SLOPE(C,21)*20+C,42);
BU:=CROSS(买线,卖线);
SEL:=CROSS(卖线,买线);
DRAWTEXT(BU,LOW,'买'),COLORRED,LINETHICK2,VALIGN0;
DRAWTEXT(SEL,HIGH,'卖'),COLORGREEN,LINETHICK2;
/*
STICKLINE1(买线>=卖线,LOW,HIGH,0.5,1),COLORRED;
STICKLINE(买线>=卖线,CLOSE,OPEN,10,0),COLOR000044;
STICKLINE(买线>=卖线,CLOSE,OPEN,7,0),COLOR000066;
STICKLINE(买线>=卖线,CLOSE,OPEN,3,0),COLOR000088;
STICKLINE(买线>=卖线,CLOSE,OPEN,1,0),COLORRED;
STICKLINE(买线<卖线,CLOSE,OPEN,10,0),COLOR004400;
STICKLINE(买线<卖线,CLOSE,OPEN,7,0),COLOR006600;
STICKLINE(买线<卖线,CLOSE,OPEN,3,0),COLOR008800;
STICKLINE(买线<卖线,CLOSE,OPEN,1,0),COLOR00FF00;
STICKLINE1(买线<卖线,LOW,HIGH,0.5,1),COLOR00FF00;
STICKLINE(CROSS(买线,卖线) ,OPEN,CLOSE,10,0),COLOR0033FF;
STICKLINE(CROSS(买线,卖线) ,OPEN,CLOSE,7,0),COLOR0055FF;
STICKLINE(CROSS(买线,卖线) ,OPEN,CLOSE,3,0),COLOR0099FF;
STICKLINE(CROSS(买线,卖线) ,OPEN,CLOSE,1,0),COLOR00FFFF;
STICKLINE( CROSS(卖线,买线),OPEN,CLOSE,10,0),COLOR333300;
STICKLINE( CROSS(卖线,买线),OPEN,CLOSE,7,0),COLOR555500;
STICKLINE( CROSS(卖线,买线),OPEN,CLOSE,3,0),COLOR777700;
STICKLINE( CROSS(卖线,买线),OPEN,CLOSE,1,0),COLORFFFF00;
指导线:EMA((EMA(CLOSE,4)+EMA(CLOSE,6)+EMA(CLOSE,12)+EMA(CLOSE,24))/4,2),LINETHICK3,COLORFFFFFF;
界:MA(CLOSE,27),LINETHICK2,COLOR00FFFF;
*/
