The best market to trade as a part time investor would be the Asian time zone which is your evening. Korea has the highest futures liquidity by far and Hong Kong provides fair execution on futures and options on futures pricing for the index. These are both electronic venues with one exchange so liquidity is focused in one place and liquidity providers cant take advantage of you.
Japan used to be the largest but not as correlated.
Japan used to be the largest but not as correlated.