Can anybody say....basing on this method, what would have been the strategy on 17th Nov?, In my opinion buy.......then on 18th nov08, i would have incurred loss.....in my opinion too many dependent variables of a single function which are correlated.....no holy grail method.....but nice idea, since all professionals take decision during the last 30 minutes of the market, swing trade sort of......best of luck...we can still refine our method, which seems promising once we hedge ourselves to losses