Directional Bias For The Day: S&P Futures are lower; moving  mostly  lower since 7:45 AM on April 18; Broken below a descending triangle on 6-minute chart; 61.8% extension target near 2698.75 is achieved; 100% extension target is near 2695.50 Odds are for a down move – watch for break above 2708.00 for change of fortunes Key economic data due Unemployment…