Dear Friends,
I have observed one trend, which I am sharing here. If Nifty opens gap up and remains up by 15 pts atleast at 10:30 AM, then expect a up trend that day till 2:30 PM atleast. Check the trend at 3:00 PM if Nifty is up and remains up by 15 pts till 3:15 PM then, expect market to open gap up next day. Otherwise its a gap down.
I personally observed above and found it okay most of the time. Above doesn't hold good if there is some news.
Regards