DIFF:=EMA(CLOSE,12)-EMA(CLOSE,27)COLORWHITE;DEA:=EMA(DIFF,9),COLORYELLOW;JCCOUNT:=COUNT(CROSS(DIFF,DEA),BArslAst(DEA>=0));四次金叉:CROSS(DIFF,DEA) AND DEA<0 AND COUNT(JCCOUNT=4,5)=1;