Is RSI above 70 a sell signal?

RSI above 70 is not automatically a sell signal; it indicates overbought momentum that often signals strength, not exhaustion. Treating RSI above 70 as an automatic sell signal is the most expensive mistake beginners make; in strong uptrends, the best moves happen while RSI is above 70. A genuine sell setup forms when RSI moves above 70 and then drops back below it, often interpreted as a signal to sell or take profits, especially in a ranging market. Confirm with bearish divergence or price action before acting.