Forex Introduction, For A Begginers

One day  Ali, a trader at a forex company sat near the window. that afternoon, he finished scolded investors because the investors suffered a loss. seemingly profitable investment was turned 180 degrees so that the investors had to swallow the bitterness of loss. Feeling disappointed, investors were later accused the company of Ali and shelter to commit fraud. Ali with an effort to explain that what happened is the risk of forex trading. but the investors still refused to accept that explanation. by investors, not the invested funds may run out in the blink of an eye.

Next, what is FOREX ?..... :)