Directional Bias For The Day: S&P Futures are higher; rising since 3:00 PM on May 9 in an up-sloping flag on 30-minute chart Odds are for an up to sideways day with increased volatility – watch for break above 2707.75 and break below 2695.00 for more clarity Key economic data due: Prelim GDP ( 2.2% vs. 2.3% est.) at…