Investopedia explains 'Price Persistence'
Opinion is divided on the investment merits of stocks displaying a high degree of price persistence. Technical analysts who believe that the "trend is your friend" may consider a stock in a strong upward trend as a good investment candidate based on the view that the stock's move higher will continue. Others may consider such a stock as overbought, and therefore a sell candidate or one to which fresh capital should not be committed.
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