SPX find itself on a very decisive moment, in fact the price is sitting on the 38.2% Fibonacci retracement of the entire down move. Additionally, we are touching the top of the descending triangle. A breakout could send the price straight to the 50% retracement (4'155), a rejection would send it lower to test the 23.6% retracement at 3'812. Looks like a very clear setup for the next move, don't trade here but wait for the direction.