Gaps were created based on the index called sgx nifty.You can see the index on tv screen any time.
Sgx nifty is traded approx 4 hours after our market is closed, and it starts trading before our market opens.
nifty index will run parallel to this index only.
Big people were trading in this index ,and they will adjust or hedge their positions in this index
according to the global events.
Why this concept is introduced?.
Retail has to suffer and big people has to get rich and rich.