Ahhh.. If Shuchishin index is below 9K tonite.. Well I think ayu's index will still be higher (I assume her index will be around 4K at least rite?).
The point is... right now their difference is 8961 (index). That means for the next 2 days ayu's index must not be averagely 4000 lower than SCS. But Natsu Style (a Japanese site doing prediction about the sales/indexes) predicted that SCS's index for Sat and Sun will be around 12K per day, while ayu's index will be about 4.5K per day (URL:
http://blog.livedoor.jp/ustan777/archives/51273104.html). I think their guess is pretty logical except that I hope ayu's index should be at least 5K per day for the next two days..
Edit: Of course, like Luv said, the actual sales may be higher in the end. Cuz the factor is not always 1.75. The recent example is that Hikki's HEART STATION first week factor was 1.78, which was 0.08 higher than usual album factor (1.7). The thing is, if the overall index for SCS is like 2000 higher than ayu, I dun think ayu could win even if her factor is more than 1.75..