I got your point, but if he is an IB, his aim was to receive commission and not to trade personally, no? I haven't seen any statements from
@Sangtruong
I understand that IB asks here to clarify about his clients funds, but currently we can see that each client has created their own thread.
So where is the truth? As well there were no proofs attached by your clients and all the situation makes me think that you don't understand the regular rules. There is a fine line between profitable trading/idea and becoming a fraudster and from your reply it looks like you sold your idea to investors without deep understanding of the marker rules.
Regularly, IBs who are related to trading somehow find investors with money and without knowledge about trading and once they failed with their "successful strategy" and lose investors money they start to blame brokers.
Arbitrage is a kind of hedging, but it's a different thing,
illegal. In general it's when you
buy in one broker and sell the same instrument in another one.
So I'm sure that your clients were buying EUR/USD in other brokers you mentioned before. And I think it's a matter of time before other brokers catch you on violation T&C.