如果只需要更改K線顏色，將公式中的“blue”和“red”互換就可以了：

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),COLORRED,1);

STICKLINE(CLOSE>EMA2(HIGH,150),EMA2(HIGH,150),EMA2(LOW,150),COLORLIGHTBLUE,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),COLORRED);

PARTLINE(CLOSE>EMA2(LOW,30),EMA2(LOW,30),COLORMAGENTA);

PARTLINE(CLOSE<EMA2(LOW,30),EMA2(LOW,30),COLORRED);

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),COLORLIGHTBLUE);

PARTLINE(CLOSE<EMA2(LOW,150),EMA2(LOW,150),COLORLIGHTGREEN);

STICKLINE(OPEN>=CLOSE,CLOSE,OPEN,COLORBLUE,0);

STICKLINE(CLOSE>=OPEN,CLOSE,OPEN,COLORCYAN,0);

DRAWTEXT(SS,LOW,'買入');

DRAWTEXT(XX,HIGH,'賣出');