U.S. President, Richard Nixon is credited with ending the Bretton Woods Accord and fixed rates of exchange, eventually resulting in a free-floating currency system. After the Accord ended in 1971,[31] the Smithsonian Agreement allowed rates to fluctuate by up to ±2%. In 1961–62, the volume of foreign operations by the U.S. Federal Reserve was relatively low.[32][33] Those involved in controlling exchange rates found the boundaries of the Agreement were not realistic and so ceased this[clarification needed] in March 1973, when sometime afterward[clarification needed] none of the major currencies were maintained with a capacity for conversion to gold[clarification needed], organizations relied instead on reserves of currency.[34][35] From 1970 to 1973, the volume of trading in the market increased three-fold.[36][37][38] At some time (according to Gandolfo during February–March 1973) some of the markets were "split", and a two-tier currency market[clarification needed] was subsequently introduced, with dual currency rates. This was abolished in March 1974.[39][40][41]
Hedge funds – Somewhere around 70 to 90% of all foreign exchange transactions are speculative in nature. This means, the person or institutions that bought or sold the currency has no plan of actually taking delivery of the currency; instead, the transaction was executed with sole intention of speculating on the price movement of that particular currency. Retail speculators (you and I) are small cheese compared to the big hedge funds that control and speculate with billions of dollars of equity each day in the currency markets.

The optimal time to trade the forex (Foreign Exchange) market is when it's at its most active levels, when trading spreads (the differences between bid prices and the ask prices) tend to narrow. In these situations, less money goes towards the market makers who facilitate currency trades, leaving more money for the buying and selling investors to personally pocket.
For insight into what’s driving FX rates, index trends and commodity pricing, click on any of the markets displayed. You’ll find a host of in-depth data, including live price charts, breaking news, and expert insights. You can also view client sentiment data on live currency rates. This shows what percentage of IG’s clients are long and short on each.
The four major forex exchanges are located in New York, London, Singapore and Tokyo. When more than one exchange is simultaneously open, this not only increases trading volume, it also spikes volatility (the extent and rate at which equity or currency prices change), which likewise benefits forex traders. This may seem paradoxical. After all, investors generally fear market volatility. But in the forex game, greater volatility translates to greater payoff opportunities.
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For example, if Company A is based in the U.S. and wishes to use the EUR/USD trading pair to buy Euros to pay employees located in Europe, they would tap the forex market. However, if the price quote rapidly changes between several hours and Company A is set to exchange a large sum of USD for EUR, then a small adverse price fluctuation could have a significant impact on their bottom line.
You can profit from this! A lot of the major pairs like EURUSD, GBPUSD and USDCHF experience massive movements and specific patterns during this time. In fact, I created a holistic trading strategy for the GBPUSD just based on this one fact. The strategy is called Simple System v6.0 and you can find it in this course. It uses an extremely profitable pattern that I discovered for GBPUSD.
JPMorgan Chase got financial earnings off to a good start today, easily beating expectations when they announced this morning. Their stock is up $5 or 4.7% at 111.255%.  Does their momentum translate for the other financials next week? We will see as a number of Financials including Citi, Goldman Sachs, Bank of America, Morgan Stanley  and Amerian express release next week.  
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.)