Interest Rate Influences
When the interest rates are raised, investors will want to capitalize on high returns and you will see money flowing into the country. When one country's interest rates rise, their currency is seen as being stronger than the other currencies. This happens because investors seek more of that currency to profit more. Simply put, it is seen as a good thing when interest rates are hiked and an adverse thing when they are cut.
For example, higher interest rates in the United Kingdom may prompt Japanese investors to sell the Japanese yen and buy bonds in British pound. Similarly, if interest rates increase in the United States, those investors may decide to sell their Pound-bonds and move into bonds in US dollar, driving the British pound down and the US dollar up.
Geo-Political Events Influences
When there is geo-political news of macroeconomic proportions such as political instability, coup d'état, earthquakes, or hurricanes in other countries, it drives up the demand for the safety currencies like the US dollar as investors look for a "safe haven" for their capital investments.
Petroleum Prices Influences
When the prices of petroleum-related products such as crude oil and natural gas rise, the currency values of oil-dependent countries such as the United States and Japan weaken as a result of high production costs, consequently leading to inflationary pressures in the economy.
If you believe oil prices will continue to rise, you can consider buying commodity-based currencies such as the Canadian dollar or the Australian dollar or by selling oil-dependent currencies.
Gold Prices Influences
When the prices of precious metals such as gold and silver rise, the value of the US dollar weakens as the currency has an inverse relationship with gold prices. Historically, gold was a safe haven of major currencies back in the 19th century, but in the current Floating Period, the US dollar is known as the safe haven of major currencies.
When the gold price breaks into an important level, currencies of major gold producers such as the Canadian and Australian dollars are expected to rise against the Japanese yen and the British pound.