Day Trading
Day Trading is opening and closing a position or positions within the same trading session in order to take advantage of short term currency changes.

Dealer
A Dealer is an agent who provides quotes and takes care of instructions from investors regarding decisions concerning the purchase or sale of currencies.

Dealing Desk
A Dealing Desk is the desk where transactions for buying and selling securities occur.

Deposit
A Deposit is a portion of the final investment that is put in safe keeping, insuring that the transaction will take place.