Directional Bias For The Day: S&P Futures are lower; resuming the downtrend since 4:30 AM The odds are for a down day with elevated volatility; watch for break above 3104.00 for change of fortune Key economic data due: Core Durable Goods Orders ( 0.9% vs. 0.2% est.; prev. 0.1%) at 8:30 AM Durable Goods Orders…