Best Brokerage rate to trade SG stocks

Buy Shares:
using DBS Vickers cash upfront at 0.18% brokerage min $18

Sell Shares:
If selling shares within contra period, sell using DBS vickers cash upfront at the same rate

If more than contra period, sell using citibank Brokerage at 0.25% (below $50,000) brokerage 0.2%($50,000-$100,000) and 0.18%(more than $100,000) min $18