Directional Bias For The Day: S&P Futures are higher; moving up since 12:30 PM on Wednesday The odds are for an up to sideways day with elevated volatility – watch for break below 2785.00 for change of fortune Key economic data due: Prelim GDP (3.1% vs. 3.1% est.; prev. 3.2%) at 8:30 AM Prelim GDP…