Oanda claim that European regulations prevent them from letting you 'hook in' to their trading system using TradingView for the purposes of trading (as opposed to market analysis). Their platform uses an older, cut down version of TradingView itself which is nowhere near as good.
I would have thought said regulations would prevent the use of the likes of PRT, except that PRT is French and hence might be exempt from European protectionist policies.
Remember, all of these financial institutions are AGAINST free competition. They are f*king corrupt as all hell.