如何編寫通達信MACD和OBV同時金叉和死叉的公式！

VA:=IF(CLOSE>REF(CLOSE,1),VOL,-VOL);

OBV:=SUM(IF(CLOSE=REF(CLOSE,1),0,VA),0);

MAOBV:=MA(OBV,30);

DIFF :=EMA(CLOSE,12) - EMA(CLOSE,26);

DEA :=EMA(DIFF,9);

MACD :=2*(DIFF-DEA);

XG:CROSS(OBV,MAOBV) AND CROSS(DIFF,DEA);

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死叉

VA:=IF(CLOSE>REF(CLOSE,1),VOL,-VOL);

OBV:=SUM(IF(CLOSE=REF(CLOSE,1),0,VA),0);

MAOBV:=MA(OBV,30);

DIFF :=EMA(CLOSE,12) - EMA(CLOSE,26);

DEA :=EMA(DIFF,9);

MACD :=2*(DIFF-DEA);

XG:CROSS(MAOBV,OBV) AND CROSS(DEA,DIFF);

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應該是這樣寫的