夜雨聆风Idea 1:均值差
close-group_mean(close,1, industry)
Idea 2：变化率
ts_delta(ts_delta(close,5),7)
Idea 3：分组排名差Base = group_rank[datafield, subindustry) - group_rank(datafield, market)Base = group_rank(datafield, market) - grgr = group_rank/group_mean(datafield, subindustry), market)Idea 4：两个指标间的排名差Base = ts_rank(datafield_1,days) - ts_rank[datafield_2, days)Base = group_rank(datafield_1,group) - group_rank(datafleld_2. group)