It comes from the currency markets. What you really care about is the relative value of the first currency. The last or bottom currency is the base currency whi

It comes from the currency markets. What you really care about is the relative value of the first currency. The last or bottom currency is the base currency which is what your using to gauge the value of the first relative to other pairs with the same base. https://en.m.wikipedia.org/wiki/Currency_pair https://en.m.wikipedia.org/wiki/Currency_pair