If some one wants to copy arbitrage trading, what is the best technology to create a very fast MT4 copier?

Passing data from one MT4 client to another

If you want to connect to an account using a meta trader other than that broker, you should use the ip address in server field. Such an EA needs more extern fields to use in optimization, and as you say that's without limitation, please share the ...

scalping EA Budak Ubat + live statement