Economic theory is a aggreagation of hypotheses , each being put forward as an explanation of some aspect of economic activity . This , there have been developed theories of how prices are determined , of how banking systems operate  and of why international trade developed. Each theory has been developed by a method and set of economic rules and assumptions.  Economists devised in their minds a model and models of the real world of economics , foreign trade and foreign currency trading models and strategies. Theories are advanced and subscribed of real world activities in foreign trade and foreign currency (Forex) trading activities and trends. Divergencies aside , the model and models develop in comparison to real world activities on the daily markets.
Very likely diffrences will exist. They will always exist. Divergencies aside. There are no hard and fast rules to assess and hudge the valdities of these rules and market trends in respect to forex market hypothesises , guesses and trading hunches.

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