There is a wide range of stockbroking firms or investment banks that provides online tradings.
Below are some stockbroking firms that I used:
http://www.itradecimb.com.my/
Advantages: Provide most trading services, eg. Shares trading, commodities futures trading. User friendly Itrade CIMB web trading platform, Provide Basic Technical Analysis web platform, Frequent seminars and talks on the market, Offers Online Cross-Broder Trading (can buy overseas listed, eg NYSE, Hang Seng, SG shares through online), Offers Offline Cross-Broder Trading, convenient of transferring fund, Available of CIMB Investment Bank office in major states,