Link:https://blog.seedly.sg/the-ultimate-cheatsheet-cheapest-stock-brokerage-in-singapore/
The research link above from seedly provide a very comprehensive guide on choosing the cheapest stock brokerage in Singapore.
The 1st question to decide on a brokerage in Singapore would be: CDP or custodian?
1. What is CDP? (Central depository pte limited)
As quoted from this SGX link,"CDP is a wholly owned subsidiary of the Singapore Exchange Ltd ("SGX"). We provide integrated clearing, settlement and depository facilities for our customers in the Singapore Securities Market, including both equities and fixed income instruments.