The weeks between Rosh Hashanah (which begins tonight at dusk) and Yom Kippur (October 4th) can be volatile ones with some traders taking time away from their desk to be at home with family and lower trading volumes exhibit themselves as a result.
While the old saying goes "never short a dull market", low volume tends to be bullish BUT there could also be a problem if there's no underlying bid, or bids are being lowered on a continual basis.
As of this moment, the September low is being tested; bears hoping to trigger stops below $1979 which would issue a wave of further selling.
It's important to understand the dynamics behind the candles on the screen, where stops lie and how the market has traded historically. Be nimble or sit it out.