If I use a copy of Mt4 from my old broker and just install the new broker's server and password can they know it's from a different broker
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They can only see the order was created manually or by EA.
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I am wondering if the broker can tell where the copy of mt4 is from and what ea's etc are loaded on the current platform. Thanks
Your old broker will not know that you have logged into another broker's account using the custom branded MT4 terminal of the first broker, but its always better to download and install the custom branded MT4/5 terminal of the new broker and use to login into your new trading account.
Your old broker will not know that you have logged into another broker's account using the custom branded MT4 terminal of the first broker, but its always better to download and install the custom branded MT4/5 terminal of the new broker and use to login into your new trading account.

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