If each digit right of the cents place was 1/2 as tall as the digit to its left, I could process it more intuitively. A change of one hundred millionth of a pe

If each digit right of the cents place was 1/2 as tall as the digit to its left, I could process it more intuitively. A change of one hundred millionth of a percent is not enough to consider even if I have 10 million dollars. How is this calculated? It's a rate based on historical purchasing power parity index trends, or it's tied to live market data?