Appreciation
A currency is said to appreciate when the price rises in response to market demand; an increase in the value of an asset.
Arbitrage
The practice of taking advantage of countervailing prices in different markets by the purchase or sale of an instrument, and the simultaneous taking of an equal and opposite position in a related market to profit from small price differentials.
Ask price
The price, or rate, that a seller is willing to sell at.
Aussie
The Australian Dollar.