Hi,
To exploit triangular arbitrage from a retail perspective, i.e. using an EA, it almost impossible.
I can code this for you, but i have much experience in this sector, and writing dozens of EAs and CIs.
To exploit currency arbitrage you need data fed to you with a ping less than one, and a server in the exchange itself.
Please contact me for more details if you;d like to continue.
Kind regards
Rumman