A trend that opposes mainstream or popular trends.(noun)
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Use "countertrend" in a sentence
"As I came to the market today I figured I would begin building a small (I stress small because it's countertrend, which is not very smart) put position in SPY as a partial hedge to my long positions that I intend to hold for a little while."
"Chart levels can be particularly helpful in putting a countertrend move in perspective."
"But the preface does not mention a countertrend: a drop among people not obligated to read."