I still think there is no reason to have a bigger correction than the one we have known in August, but I believe the market has to retest the lows before rallying again.
I think several scenarios/events could hit the market before the end of October. (2 possible FOMC surprises in September/October, China issue,...) I do not know where the bad/good news will come from, but we can feel the market is waiting for it, and this is materialized by the congestion/sideways market we are experiencing today.
Technically, a congestion after a fall leads often to another fall. For the Eliott's wave amateurs, remember that in a correction we have 3 waves, a, b, c. I am waiting for the c wave. I could be wrong, I do not think we can predict the future with the charts, but there is a certain logic when we look at the past (I refer to 1987 ,1998 and 2011 corrections).
So as I actually do not want to take a decision now, I'll play the retest and I would aggressively buy in the yellow zone if we hit it.