Explanation put call option has to do with stocks. The call option is to purchase currency. However the put option is to sell currency. You can read up on call options at: http://en.wikipedia.org/wiki/Call_option. Antd then take a look at put options at: http://en.wikipedia.org/wiki/Put_option. Last but not least read about stock exchange at: http://en.wikipedia.org/wiki/Stock_exchange. Hope this
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