What is RSI (Relative Strength Index)?
RSI, the Relative Strength Index, is an oscillator that measures the speed and size of recent price changes on a scale from 0 to 100. Readings above 70 are often called overbought and below 30 oversold, though those labels describe momentum, not a signal to act. It is one of the most widely used momentum indicators.
Why RSI (Relative Strength Index) matters
It gives a quick read on whether a move has been fast and stretched, which helps frame context.
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