Will S&P 500 trend up without WTI?Frankly speaking, I do not think so. On high correlation between S&P 500 and WTI crude oil price - www.uvm.edu
If we combine both assets into one instrument we will see it fights the balance point - Demark monthly pivot.
There was also research done which showed that the entire forex market lags by a few seconds after stock indices. I do not even mention even American stock market.
www.researchgate.net