As actual moves on retail chains are probably quite small on a quarter-by-quarter basis, to be able to make any kind of money on this kind of information you ha

As actual moves on retail chains are probably quite small on a quarter-by-quarter basis, to be able to make any kind of money on this kind of information you have to be levered up to your ears. Which also means that if you are wrong, you are going to lose a lot of money. Getting that error probability way way down is a priority.