Directional Bias For The Day: Greater likelihood of a range bound day The 30-minute chart of S&P 500 future is carving out a symmetric triangle within a narrow rectangle trading box, which has been in effect since July 13th, bounded between 2173 and 2153 Critical support levels for S&P 500 are 2159.74, 2154.44 and 2149.14 Critical resistance levels for…