One-leg arbitrage is a trading strategy in which a trader takes advantage of the difference in the quotes feed of two different brokers. Software homepage: http://offers.fxpartner.net/fix-api-arbitrage-development-2/ For a number of reasons, some forex brokers might provide market quotes faster than others. This can lead to an arbitrage situation – the prices provided by two brokers for the same security might be different. If this happens, a trader can open an order with the slower broker, thus entering an arbitrage trade. Read more: http://blog.iticsoftware.com/forex-arbitrage-2/