Directional Bias For The Day: S&P Futures are lower; moving lower since 4:30 AM below a downtrend line on 30-minute chart Odds are for a down day; watch for break above 2921.25 Key economic data due: Core PCE Price Index (0.0% vs. 0.1% est.) at 8:30 AM Personal Spending (0.3% vs. 0.3%est.) at 8:30 AM Personal Income (0.3% vs. 0.4% est.) at 8:30…