You are correct about the interest. You get paid daily with oanda. If you are long eur/usd, you have to pay 1.25% interest. Being short xau/usd about 500 units pays somewhere around $45 a day interest, but that pair(gold) can move 1000 pips in 10 minutes and break your bank. cross/jpy pairs pay the best interest because jpy only has a .50% rate. However, if jpy hikes rates, it will cause a mess in the pairs. Most of the jpy pairs seem to be slowly turning into short plays at the moment. If you are short, you have to pay the interest differential. I'm still holding aud/usd short. What a poring pair today! I should've stayed in bed!