Arjun, No its not like this. As per SH's guidelines all Crossovers are valid on close as the values used in the EMA calculatin is based on Close of the day!
If you would notice the crossover(as per value given by tanewbie) happened today at : 9:35 high was 92.75 again at 10:25 , 10:35, 10:45, and there after the High has been below 5591!!
So we do not go in and out of the trade on every breach of crossover level. As you said wait till 15.25, Arjun, after doing a high of 5596.75 NF went down to 5565 today. It is back to > 5592. You may be proved correct "TODAY" at 3:25 But Suppose we exited our short when Long crossover happened and were waiting and the Price went down say maybe 5500 (we would still be waiting)and at 3:25 we had 5510... we would be loosing a lot of Points... we take chance but according to the Strategy!! Prefer loosing a few points or more but stick to the strategy!! All crossovers as per Rules are determined at 3:25 r later only!!!