Directional Bias For The Day: S&P Futures are higher; moving sideways to up since 6:00 PM on Wednesday in a narrow range Odds are for a sideways to up day – watch for break above 2845.50 and below 2839.00 for clarity Key economic data due: Advanced GDP (4.1% vs. 4.2% est.) at 8:30 AM Advanced GDP Price Index (3.0% vs.…