Currency trading involves buying one currency and simultaneously selling the other one. To facilitate such operations, currencies are traded in pairs. For example, EUR/USD, Euro vs. US Dollar pair.
To trade on the currency market online, there is no need for you to make a large initial investment. To reduce the cost of the transaction, you can use a smaller lot (a minimum lot on Elite Wealth Capital is 100 USD), or leverage. The latter expands your trading capacities but also increases the risks.