以下是文华长短买卖波段副图指标源码（无源码的请下载附件导入）

S:=CROSS(CLOSE,EMA2(HIGH,30));
 X:=CROSS(EMA2(LOW,30),CLOSE);
 WS:=BARSLAST(S)+1;
 WX:=BARSLAST(X)+1;
 SS:=CROSS(SUM(S,WX),0.5);
 XX:=CROSS(SUM(X,WS),0.5);
 STICKLINE(CLOSE>EMA2(HIGH,30),EMA2(HIGH,30),EMA2(LOW,30),COLORMAGENTA,1);
 STICKLINE(CLOSE<EMA2(LOW,30),EMA2(LOW,30),EMA2(HIGH,30),COLORBLUE,1);
 STICKLINE(CLOSE>EMA2(HIGH,150),EMA2(HIGH,150),EMA2(LOW,150),COLORLIGHTRED,1);
 STICKLINE(CLOSE<EMA2(LOW,150),EMA2(LOW,150),EMA2(HIGH,150),COLORLIGHTGREEN,1);
 PARTLINE(CLOSE>EMA2(HIGH,30),EMA2(HIGH,30),COLORMAGENTA);
 PARTLINE(CLOSE<EMA2(HIGH,30),EMA2(HIGH,30),COLORBLUE);
 PARTLINE(CLOSE>EMA2(LOW,30),EMA2(LOW,30),COLORMAGENTA);
 PARTLINE(CLOSE<EMA2(LOW,30),EMA2(LOW,30),COLORBLUE);
 PARTLINE(CLOSE>EMA2(HIGH,150),EMA2(HIGH,150),COLORLIGHTRED);
 PARTLINE(CLOSE<EMA2(HIGH,150),EMA2(HIGH,150),COLORLIGHTGREEN);
 PARTLINE(CLOSE>EMA2(LOW,150),EMA2(LOW,150),COLORLIGHTRED);
 PARTLINE(CLOSE<EMA2(LOW,150),EMA2(LOW,150),COLORLIGHTGREEN);
 STICKLINE(OPEN>=CLOSE,CLOSE,OPEN,COLORRED,0);
 STICKLINE(CLOSE>=OPEN,CLOSE,OPEN,COLORCYAN,0);
 DRAWTEXT(SS,LOW,'买入');
DRAWTEXT(XX,HIGH,'卖出');