So, yes, at any given trading center, it's an eight hour day. But that really doesn't matter, because somewhere in the world trading centers are open. You can trade anytime you want, although you should also note that you'll get the narrowest spreads -- the broker's profit margin -- when the maximum number of trading centers are open or, more precisely, when the trading volume for your currency trade is greatest. 

NZDUSD bounced nicely off its support at 0.6723 (100% Fibonacci extension, 61.8% Fibonacci retracement, horizontal swing low support) where it could potentially bounce to its resistance at 0.6765 (61.8% Fibonacci retracement, horizontal swing high resistance). Stochastic (55, 5, 3) is bounced off its support at 2.05% where a corresponding rise could occur.
Many people question what a trader’s salary is. However, the truth is it varies hugely. The majority of people will struggle to turn a profit and eventually give up. On the other hand, a small minority prove not only that it is possible to turn a profit, but that you can also make huge returns. So it is possible to make money trading forex, but there are no guarantees. 75-80% of retail traders lose money.
The need to exchange currencies is the primary reason why the forex market is the largest, most liquid financial market in the world. It dwarfs other markets in size, even the stock market, with an average traded value of around U.S. $2,000 billion per day. (The total volume changes all the time, but as of August 2012, the Bank for International Settlements (BIS) reported that the forex market traded in excess of U.S. $4.9 trillion per day.)