kdj的值大于40小于85的范围内，kdj先死叉后，4天内又金叉的选股公式

85>MAX(KDJ.J,MAX(KDJ.J,KDJ.K)) AND
40<MIN(KDJ.J,MIN(KDJ.J,KDJ.K)) AND
SUMBARS(CROSS(KDJ.K,KDJ.J),1)<3 AND
CROSS(KDJ.J,KDJ.K);