a:="SH000001$close";上证今日强:(a/ref(a,1)-1)*100;上证三日强:(a/ref(a,3)-1)*100;上证五日强:(a/ref(a,5)-1)*100;今日强:(c/ref(c,1)-1)*100;个股三日强:(c/ref(c,3)-1)*100;个股五日强:(c/ref(c,5)-1)*100;今日强:个股今日强-上证今日强;三日强:个股三日强-上证三日强;五日强:个股五日强-上证五日强;