Foreign exchange (Forex) products and services are offered to self-directed investors through Ally Invest Forex LLC. NFA Member (ID #0408077), who acts as an introducing broker to GAIN Capital Group, LLC ("GAIN Capital"), a registered FCM/RFED and NFA Member (ID #0339826). Forex accounts are held and maintained at GAIN Capital. Forex accounts are NOT PROTECTED by the SIPC. View all Forex disclosures
Another example involves buying a long call option for a $2 premium (so for the 100 shares per contract, that would equal $200 for the whole contract). You buy an option for 100 shares of Oracle (ORCL) for a strike price of $40 per share which expires in two months, expecting stock to go to $50 by that time. You've spent $200 on the contract (the $2 premium times 100 shares for the contract). When the stock price hits $50 as you bet it would, your call option to buy at $40 per share will be $10 "in the money" (the contract is now worth $1,000, since you have 100 shares of the stock) - since the difference between 40 and 50 is 10. At this point, you can exercise your call option and buy the stock at $40 per share instead of the $50 it is now worth - making your $200 original contract now worth $1,000 - which is an $800 profit and a 400% return. 

For strangles (long in this example), an investor will buy an "out of the money" call and an "out of the money" put simultaneously for the same expiry date for the same underlying asset. Investors who use this strategy are assuming the underlying asset (like a stock) will have a dramatic price movement but don't know in which direction. What makes a long strangle a somewhat safe trade is that the investor only needs the stock to move greater than the total premium paid, but it doesn't matter in which direction. 
Whereas price extremes have no boundaries, they don't last forever, eventually commodity market supply and demand factors will bring prices back to a more equilibrium state. Accordingly, while caution is warranted at extreme levels it is often a good time to be constructing counter trend trades as it could be one of the most advantageous times in history to be involved in a market. For instance, similar to the idea of call options being over-priced when a market is at an extreme high, the puts might be abnormally cheap. Once again, your personal situation would determine whether an unlimited risk or limited risk option strategy should be utilized. Please realize that identifying extreme pricing scenarios is easy, it is much more difficult to predict the timing necessary to convert it into a profitable venture.

Pay a “premium” wherever you buy a commodity option. Let's say you purchase a “call” option on 100 bushels of corn, and the premium is $2 per bushel. You will pay $200 for the right to exercise your option until it expires. That is your only cost to purchase the option, except for whatever commission you had to pay to your brokerage company. Even if you choose not to exercise the option before it expires, your investment will be limited to the $200 premium plus commission.

A call option is a contract that gives the investor the right to buy a certain amount of shares (typically 100 per contract) of a certain security or commodity at a specified price over a certain amount of time. For example, a call option would allow a trader to buy a certain amount of shares of either stocks, bonds, or even other instruments like ETFs or indexes at a future time (by the expiration of the contract).