Spot FX
A spot trade is either buying or selling at a current rate. It involves a direct exchange between to currencies. It involves cash instead of a contract and interests are not included upon the agreed transaction.
This transaction is a 2 day delivery transaction (T+2). Except CAD pairs which are T+1.
If you want to keep the position open or rollover you must enter into a swap transaction involving your currency pair.
FX CFDs
FX CFDs are spot trades which close and reopen in the end of the day. Therefore no physical delivery will every take place.
FX CFDs have Rollover financing: Clients will either receive or pay financing.
If a client is LONG and has a higher interest yielding currency it will be credited
If a client is LONG and has a lower interest yielding currency it will be debited
If a client is SHORT and has a higher interest yielding currency it will be debited
If a client is SHORT and has a lower interest yielding currency it will be credited