What do overbought and oversold mean?
In one line: Overbought and oversold describe a market that has risen or fallen far and fast in a short time, often measured with RSI above 70 or below 30.
A simple example
A stock rises from $40 to $52 in 8 days, with only 1 small down day. Its 14-candle RSI climbs to 78. By the usual rule, that's overbought (above 70).
Another stock drops from $30 to $23 in a week. Its RSI falls to 24. That's oversold (below 30).
Some traders use 80 and 20 instead, for fewer, stronger readings.
What the words really mean
"Overbought" sounds like "too high, about to fall." That's not what it measures. It only says recent up moves have been much bigger than recent down moves.
"Oversold" says the same thing in reverse. Neither one says where price "should" be.
Why it matters
These readings help you notice when a move has been unusually strong. That can be useful:
- In an uptrend, an oversold dip may mark a deep Pullback worth watching.
- After a long run, an overbought reading can be a reminder not to chase a fast move.
Use them as context next to the chart, not instead of it. Our full guide is RSI explained.
A common mistake
Treating overbought as "sell" and oversold as "buy." In a strong Trend, price can stay overbought for weeks while it keeps climbing. Selling each time RSI crosses 70 means standing in front of the move again and again.
The same is true for oversold in a steady downtrend. A low reading can get lower.
Check the chart first. Is price still making Higher highs and higher lows? If so, "overbought" may just mean "strong."
Questions
Is overbought a sell signal?
Not on its own. It means price has risen fast. In strong trends, price can stay overbought for a long time.
What indicators show overbought and oversold?
RSI is the most common. The stochastic oscillator and Williams %R also have overbought and oversold zones.
Can a stock stay oversold for a long time?
Yes. In a steady downtrend, readings can stay low for weeks. Wait for the chart to show price turning, not just the number.
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