jphi,
For fx trading try Oanda FxTrade - http://fxtrade.oanda.com.
Have used them for 5 years and are excellent. Java based platform is excellent - much better than IG who cant fill large orders in peak trading hours, central bank interest rates (vs IG who take a heafty Margin), support from Westpac and very low spreads - AUD/USD 1.3 pips, EUR/USD - 1 Pip, USD/YEN-1.2 pips. Very tight interbank rates.
Good luck