编写条件：

编写方法：

VA:=IF(CLOSE>REF(CLOSE,1),vul,-VOL);
obv:=SUM(IF(CLOSE=REF(CLOSE,1),0,VA),0);
MaoBV:=ma(OBV,20);
MAOBV=HHV(MAOBV,20) AND MA(C,20)!=HHV(MA(C,20),20);