Definition 1.
A technical analysis indicator that compares the days that a stock finishes up against when it finishes lower. The RSI ranges from 0 to 100, but a stock is considered overbought if it reaches the 70 level, meaning that you should consider selling. When it is a true bull market, an RSI of 80 might be a better level since stocks often trade at higher valuations. Likewise, if the RSI approaches 30, it is a strong buying indicator (20 in a strong bear market).
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