ANGEL:=EMA(C,2);
DEVIL:=EMA(SLOPE(C,21)*20+C,42);
BUY2:=CROSS(ANGEL,DEVIL);
SEL:=CROSS(DEVIL,ANGEL);
DRAWTEXT(BUY2,LOW,'買'),COLORF00FF0;
DRAWTEXT(SEL,HIGH,'賣'),COLORWHITE;
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