YES, if you don’t do anything. Not like "Toto gambles on Forex". I invite you to consult advices on How to suceed on FOREX in order not to make as the majority of the particular who come to the Forex believing they know everything, being sure to  make money, and finally to get it wrong. (Stage by which I passed of course, otherwise I will not say it)

So I will introduce you how the Forex is working…
The Forex, or Foreign exchange market, is the market where we are dealing with currency pairs. Example: EURO against the DOLLAR, or more usually known as EUR/USD. So, the value of one euro in dollar is priced.  
In our example, the EURO is the basic currency, the DOLLAR is the currency which makes you earn money on Forex or not in your trades. To sum up, whatever you do on EUR/USD parity, sell or buy, you win or lose dollars. When you close your position, the profit or loss is converted into basic currency of your account at the market price.

The parities on the Forex evolve according to the economic indicators of the countries involved in parity. For the EUR/USD it will thus be necessary to take into consideration all the economic news of the Euro area, as well as the United States. Each economic news is forecast, and news better than its forecast generally makes increase the currency concerned. Thus if good news on EURO is announced, EUR/USD parity will appreciate and if USD good news comes out, EUR/USD will depreciated.

Currencies fluctuate 24h/24 and 7d/7. However, brokers do not allow you to trade during the weekend as the market is wide open for central banks, commercial banks or hedge funds that are the main stakeholders.

The Forex is an interbank market (OTC). It therefore has no definite place for such exchanges. That's why we said that the Forex never sleep. However, your broker don't allow you to trade during the weekend but the Forex is still open. So, on Sunday night, at the opening of the market, many gaps appear because stakeholders have access to the market during the weekend.

The Forex is a market that suits perfectly to technical analysis. Indeed, when no news comes out, the market will most likely follow his trend (this is why the Forex is also known as market trend), forming very often beautiful charts patterns. The most found pattern on the Forex is the channel (bullish or bearish), because there is mostly a trend, marked by corrections. In times of economic crisis, of course, the market loses its trend and it becomes more difficult to trade on the Forex.

The Forex market is very liquid. The daily volume now exceeds 3,200 billion dollars. The following chart shows the evolution of the daily volume of transactions on the foreign exchange market in billions of dollars:

These 3,200 billion dollars of transaction are composed as follow:
- 1 005 billion spot transactions
- 362 billion forward exchange
- 1 714 billion in swaps

The majority of these transactions are OTC as follows:
- 43% between banks;
- 40% between a bank and a fund manager or a nonbank financial institution
- For 17% between a bank and a non-Financial company
- For a small part, by individuals who use the platform of banks

Among these transactions, the most traded parities are the EUR / USD (about 28% of the total volume), the USD / JPY (about 17% of the total volume), the GBP / USD (about 14% of the total volume). The dollar is the most traded currency in the world, it represents more than 85% of trade on Forex, as shown in the graph below which shows the most traded currencies:

There is no problem of compensation (besides since your broker ensures you this). The volume of trade is increasing day by day, because today, it is very easy to handle on the FOREX via brokers and Internet trading platform. And so much more because all brokers offer to their customers a leverage to deal with.

The Forex is not a really a volatile market. The average daily volatility of parity is about 1.0%. The Forex is made volatile by the leverage. Indeed, if we take the example of an individual investing 10,000 Euros with leverage up to 500, it can trade with 5 000 000 Euros on the Forex. Such a position on the EUR / USD will generate variations on its balance of plus or minus 500 USD per pip. So with a level of EUR / USD at 1.4000, a simple variation of 28 pips in the wrong side will make him lose everything on his account. (Conversely, in 28 pips, it doubles its capital ...)