Directional Bias For The Day: S&P Futures are lower; The odds are for a down day with elevated volatility – watch for break above 2878.00 for change of fortune The 61.8% Fibonacci retracement of the big decline on Friday – from 2936.50 to 2810.25 – is achieved near 2888.00; the 78.6% Fibonacci retracement is near…