On 23-25.05.2017 there is an exposition in Cyprus.
You can travel and meet the faces behind those online brokers.
You may see there credit card service providers (who process credit card transactions. They are acting as a connector between the online broker and Visa, MasterCard etc.), liquidity providers (who may be on the other side of yours online trading transaction), online brokers, etc.
You can read more about the exposition at ifxexpo.com