通達信選股公式選絕佳機會？

XG:CROSS((SMA(SMA((CLOSE-LLV(LOW,21))/(HHV(HIGH,21)-LLV(LOW,21))*100,3,1),3,1)+3*STD(CLOSE,21)),(SMA((CLOSE-LLV(LOW,55))/(HHV(HIGH,55)-LLV(LOW,55))*100,5,1)))AND?(SMA((CLOSE-LLV(LOW,55))/(HHV(HIGH,55)-LLV(LOW,55))*100,5,1))<18?AND?(SMA((CLOSE-LLV(LOW,55))/(HHV(HIGH,55)-LLV(LOW,55))*100,5,1))>REF((SMA((CLOSE-LLV(LOW,55))/(HHV(HIGH,55)-LLV(LOW,55))*100,5,1)),1)OR?CROSS((SMA((CLOSE-LLV(LOW,55))/(HHV(HIGH,55)-LLV(LOW,55))*100,5,1)),5);