maybe you can use migfx — you can try migfx. this broker offer free interest account too. but if you not moslem , migfx offer you small interest . for gbp/jpy you just paid U$2.3/ days. be sides that Migfx is member of arif and this broker is ...
about arbritage — 1. hegde same pair example : long GBP/JPY at the broker free interest and short gbp/jpy at broker with high interest 2. trading balance : a. Hegde at the two bank. b. chose bank without spread, and without interest spread c. ...