Triangle pattern breakout could lead to a strong price momentum (either up or down).
RSI is in a similar pattern and candle range is very narrow which show there is a strong indecision in the market at this time.
You might want to take position only once the breakout clearly shows in which direction the market is going.
There is no way to know in which direction the market is going at this point, however I keep a bearish bias since long term analysis shows S&P might not have hit bottom yet.