Directional Bias For The Day: S&P Futures are lower to unchanged; drifting mostly up since 3:00 AM Odds are for an up day with choppiness and elevated volatility Key economic data due: Non-Farm Employment Change (155K; 198K est.;  237K prev.) at 8:30 AM Unemployment Rate (3.7%; 3.7% est.; 3.7% prev. ) at 8:30 AM Average Hourly Earnings (0.2%; 0.3% est.; 0.1%…