Many Important Factors Affecting Currency Value:

1. Political Conditions in the Country - This includes the stability of the government, the amount of corruption, bribery and the degree of law and order. Also includes a country's relationships with other countries and especially their relationship to US, UK, China and Russia. The form of government in the country is also a factor used to assess the value of a currency. Consider the widely varying forms of government in Saudi Arabia, China, UK, Venezuela and Thailand.
2. Economic Situation - This includes factors such as jobs, unemployment, work ethic, infrastructure, inflation and direction of the economy. Is it older or newer in orientation; computers and high tech, or more farming and manufacturing.
3. Perception from Outside - The perceptions and attitudes of other countries toward a country are as important as the reality of the country's actual situation. News, media, movies, newspapers, rumors and spin can create perceptions. How much is known about a country? The less that is known, generally, the lower the value of a currency.
4. Demographics - A young population may mean better prospects for the future, people who are more open to change and development and a growing size of the workforce. The overall population of a country is a factor. How much weight does this country have on the world scene.