DIF值:=EMA(CLOSE,12)-EMA(CLOSE,26);
DEA值:=EMA(DIF值,9);
三十日线:=MA(CLOSE,30);
九十日线:=MA(CLOSE,90);
均线开口:=HHV(三十日线,1)/LLV(九十日线,1)*100-100;
开口收窄:=均线开口<1 AND 均线开口>-1;
MACD金叉:=CROSS(DIF值,DEA值);
MACD开口金叉:MACD金叉 AND 开口收窄;