Octobers have the tendency to be bearish, and in some cases very bearish, months. It is likely that early-on the market makers are bullish to fatten the cattle.
If an economy, world-wide, is going through difficult or turbulent times then its bourses should be wary of the October-Factor. With that said, I would not be counting on this rally however, big or small, to sustain beyond the second week of this month!
This doesn't mean that I will be blindly shorting at some Magic-Level. If my system throws a Shorting Signal I will increase a lot or two in position size.