REAL, dependent upon usage, means either 1. in economics, refers to measures such as cost, price and income, which are corrected for inflation over time in order to permit a comparison of actual purchasing power; or, 2. actual cost, as opposed to nominal.
EXCHANGE is a. a workplace for buying and selling; open only to members, e.g. New York Stock Exchange; or, b. reciprocal transfer of equivalent sums of money especially the currencies of different countries, e.g. foreign exchange markets.
TREND ANALYSIS is the analysis of changes over time through the use of analytical techniques, such as time series analysis, to discern trends.
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