SP500 is drawing a very nasty picture

As the title says, SP500 is drawing a very nasty bearish picture.
We can see from the posted chart, that after the low from mid-June, the index started to reverse, and once it has broken above 4100 horizontal resistance I was inclined to think that the correction that started at the beginning of the year is over.
However, after it reached 4.3k zone resistance given by the descending trend line, instead of a small correction and resumption to the up move, the index has broken back under, a break marked by an immense 200 points bearish engulfing (around 5%). This type of price action is a clear indication that bears are not done yet and more losses are around the corner.
At the time of writing, SP500 is trading at 3900, exactly in the confluence support zone and, in my opinion, this level will fall soon.
In an optimistic scenario, a rebound can follow now, but this should be used as an opportunity to sell in anticipation of a break.
The target can be the 3600 low, for now though... SP500 is very probable to drop under.

P.S: Only sustained buying power above 4100 would change my bearish outlook