1. Cost is 1 thing, reliable is another
2. Sometimes, order kept on getting rejected, then it is pointless
3. Shares for KLSE or US or SG? - for KLSE, any of the investment bank will do, for SG, if you do via MYS investment bank, the cost will be high, best you open in SG. for US, you can use thinkorswim SG, but opening cost is kinda high.