^^^ It works like this. Crammed into the historical data of the various Forex currency pairs, is the reasoning of what happened. Isaac Asimov coined the term "Psychohistory."
Psychohistory "is a fictional science which combines history, sociology, etc., and mathematical statistics to make general predictions about the future behavior of very large groups of people..." -
https://en.wikipedia.org/wiki/Seldon_Plan.
Forex historical data is simply a condensed form of psychohistory regarding certain investments. Since the investments have to do with all the major currencies, they reflect all of society's usage of money, which is usually called the economy. This means that we have the reflections of the many turning points in the economy of the world, even though we don't have the reasons for the turns.
When one is simply interested in the ways that currencies react, without being interested in the underlying reasons, one of the best methods is Forex historical data. Psychohistory was determined by observing and combining the historical data of gigantic groups of people. And people regard money as one of the most important parts of life. So, what better place to go to understand the basic directions that people think than in the money historical data... the Forex. Technical indicators reflect the direction of the Forex, and the direction of the nations thereby.
Psychohistory - Forex historical data ... expressed by Forex technical indicators.