Buying a call option = right to buy the currency at a fixed strike price
Selling (writing) a call option = obligation to sell the currency at a fixed strike price
Buying a put option = right to sell the currency at a fixed strike price
Selling (writing) a put option = obligation to buy the currency at a fixed strike price.
Buying = long = means + a contract
Selling = short = means – a contract
When you buy an option = you pay a premium ($$) taken out of your account
When you sell an option = you receive a premium ($$) into your account
Selling a call option = at expiration of time period you are short (sold) a futures contract
Selling a put option = at expiration of time period you are long (bought) a futures contract