飞狐好公式不需要太复杂！

KX:=(CLOSE-LLV(LOW,9))/(HHV(HIGH,9)-LLV(LOW,9))*100;
MX:=SMA(KX,3,1),COLORRED;
ZH:=IF(BARSLAST(CROSS(MX,KX))>=3 AND CROSS(KX,MX) AND MX<30,20,0);
BUY:IF(ZH>0,1,0),COLORYELLOW;