Need quick help about arbitrage

I need to know something about arbitrage. Assume that I'm using 3 accounts with different brokers, so I'm opening same position in same direction in all accounts. Will my profits cancelled or will I be blocked by broker saying that I'm doing arbitrage? What's arbitrage exactly, I see a lot of complaints trader's accounts being blocked because of arbitraging, but they don't actually doing arbitrage. Can someone please help me? Thanks in advance.

Well, look, in fact, arbitrage is about making a profit by observing the difference between several exchanges. I don't think what you're doing is arbitrage. You can cooperate with several brokerage companies. This is not forbidden. But if you are hesitant, when communicating with the managers of a company, do not mention that you trade somewhere else. This is your personal business. But it can lead you to be persuaded to transfer all the money to the same company.
Do you want to have these conversations? I don't think so. So trade calmly, I think it's the right way to minimize the risks and you'll succeed. The main thing is to stick to the planned plan and not to forget about error analysis.