DIF:=EMA(CLOSE,12)-EMA(CLOSE,150); DEA:=EMA(DIF,9); MACD:=(DIF-DEA)*2; XG:MACD<0 AND MACD>REF(MACD ,1) AND REF(MACD ,1)<REF(MACD ,2) AND REF(MACD ,2)<REF(MACD ,3) AND REF(MACD ,3)<REF(MACD ,4);