Triangular Arbitrage EA v1.0 MT4 is the result of differences between three foreign currencies that occur when the exchange rates of the currencies do not really match. These opportunities are rare and traders who use them usually have sophisticated computer equipment and / or programs to automate the process. Traders will exchange amounts at one level (EUR / USD), convert them back (EUR / GBP) and then convert them back to the original (GBP / USD), and assuming low transaction costs, net profit.