Market makers - big boyz can not lift market now, it will be heavily shorted.
They need uncertainity.
If it will fall down it will be not that early.
Before Fed they have "look, we keep it up just with highest effort" .
But in fact I believe the agreement what will FED do is finished, the meeting will be just public theatre.
They will give both bulls and bears hope that big breakout will be in their direction and in fact it will be just "money shaving" both sides. Lot of fake breakouts.