Verno said:Is oanda effectively a spread betting company, ie if I use them will I be taxed on my profits?
With regard to the taxation part you may have to ask your tax accountant, it depends on your particular situation, eg. tax domicile etc.
As to the spread betting question, I would say Oanda is not. The spread betting companies usually refer to UK companies.
According to its site http://fxtrade.oanda.com/about/about_fxtrade.shtml "OANDA is a registered Futures Commission Merchant (FCM) with the Commodity Futures Trading Commission (CFTC) and is a member of the National Futures Association (NFA)".
Its business address is in Canada.