The method to trade option is the same as the method to trade stocks, we just need to select the order type, then input the price and the quantity, finally click one of the two buttons titled 'Buy' and 'Sell' .

If you are choosing to 'Buy' a call option, it means that you will have the right to buy the security at a predetermined price from the option seller.

If you are choosing to 'Buy' a put option, it means that you will have the right to sell the security at a predetermined price to the option seller.

If you are choosing to 'Sell' a call option, it means that you will have the obligation to deliver the security at a predetermined price to the option buyer.

If you are choosing to 'Sell' a put option, it means that you will have the obligation to buy the security at a predetermined price from the option buyer.