I chose to trade HSI because SGXNK had too many days where it had no good moves intraday.
HSI is diffcult to trade intraday due to the fact that decisions need to be made very quickly within 1-2 seconds. Even DAX, which is one of the fastest index futures, does not not move even close to HSI speed.
Another HSI con is that it is much thinner then SGXNK.