So why do currency values change?
There are three apparent reasons for this.
1. Currencies react to political and economic news. The #Brexit issue is the most recent political mania. Such issue is affecting the currencies specifically pound. In my recent blogpost I showed the immediate effect of votation. Please scroll down to the previous posts to check it.
2. Speculators drive the market such as the technical analysts who takes advantage of either bearish or bullish market.
3. Of course there's the international business flows. The law of supply and demand affects the currency fluctuation. For instance, oil drives the market fluctuation.