M4Markets seems pretty new. Do they use well-known authority to regulate their platform?

https://www.m4markets.com

M4Markets is licensed under FSA - M4Markets is the trade name of Trinota Markets (Global) Limited, a company regulated as a Securities Dealer by the Financial Services Authority of Seychelles with licence no. SD035. 

As a well known financial regulator in the offshore zone Seychelles, FSA actually doesn't enact stringent regulatory laws and requirements for brokers, therefore does not bring sharp guarantees to the traders. If you are looking for brokers under strict regulation, we would recommend brokers regulated by reputable financial authorities like FCA, NFA, ASIC and CySEC, etc.