[求助]總是出現最后一行說是非法字符 ？

 ABC:IFELSE(BUYSIG AND (((LASTBUY-LASTSELL<=2) AND LASTBUY>=5) OR (LASTBUY-LASTSELL>2)),1,0),NODRAW;
ABC=1,BK;
AUTOFILTER;

節選了三行供老師參考，總是說是后一行有非法字符 請老量指點！謝謝！