Stocks are being held hostage by the dollar and the S&P 500 is in a "struggling trend" that could push the index lower or lead to "horizontal" gains, Bill McLaren, independent trader, told CNBC.
Stocks are being held hostage by the dollar and the S&P 500 is in a "struggling trend" that could push the index lower or lead to "horizontal" gains, Bill McLaren, independent trader, told CNBC.