can open by going to PHILIP securities singapore. just open an account in sg local bank to link up to the acc prior to that.  i found that in terms of brokerage fee is way lower comparing trading frm malaysia. somemore able to trade US stock in real time with low brokerage fee ( min US 20 or 0.4 %).
i dun like local securities which impose a lot of extras fees ( stamp duties,, blah blah...) after 2 yrs with them, services are found ok.