For us Normies: what RSI says about momentum, and why overbought is not a warning
RSI is a 0 to 100 score of how hard a price has been pushing in one direction. Here is how to read it, and what one stock's trend looks like next to it.
What RSI is
Start with momentum: how strongly a price has been moving in one direction. Think of a runner on a hill. Momentum is not where the runner is, but how hard they have been pushing lately.
The Relative Strength Index, or RSI, puts a number on that push. It scores recent gains against recent losses on a 0 to 100 scale. The classic setting looks back 14 days.
When recent gains clearly outweigh recent losses, the score climbs. When losses dominate, it falls.
Why it matters, and what it does not tell you
RSI gives you a quick read on how stretched a recent move is. A stock that has run hard may pause, and that is what the word overbought is meant to capture. The glossary puts it this way: a move that has run hard and may pause, not a forecast of a fall.
That last part is the key. Strong uptrends can stay overbought for a long time, so a high RSI alone is not a reason to turn negative on a stock.
So RSI describes the strength of a recent move. It does not say how long the move will last, and it says nothing about a company's business.
How to read it
The usual thresholds are simple. RSI above 70 is commonly read as overbought, and below 30 as oversold.
Treat those lines as prompts to look closer, not as instructions. A reading above 70 inside a strong uptrend is a very different situation from a reading above 70 in a market that has no direction. The trend is the context.
Settings matter too. Comparing RSI values computed with different settings is a common trap, because the same stock can show different numbers.
The chart below shows MU's price with its 8- and 21-day EMAs (exponential moving averages, which are smoothed price averages that give more weight to recent days), with RSI underneath. Look for the 70 and 30 lines on the RSI panel, and watch how the RSI line moves as the price climbs from April to October 5.
How TradeStory AI does it
We use the standard 14-day RSI with Wilder's smoothing, the same setting most charting platforms use. Wilder's smoothing is the original RSI averaging method, which reacts gradually to new prices.
We flag a reading of 70 or more as overbought. That flag is shown as a caution note; it never blocks a name from our lists on its own.
Because RSI is one input among several, we read it next to the trend. Our setup read also shows the 8-day and 21-day EMAs, the last EMA cross, a resistance level, a 20-day support level and a pre-breakout score.
Today in our data
Our setup read for MU is dated 2026-10-05. The last close was 1063.96, and the trend reads as an uptrend. The verdict field reads bullish.
The setup is described as a pullback after a breakout: 4.0% below the 1108.72 high, and above the 21-day EMA. That 1108.72 level is also the resistance level in the read.
The 8-day EMA is 1066.19 and the 21-day EMA is 1032.83. The last cross between them was bullish, on 2026-08-14. The 20-day support level is 902.6.
The pre-breakout score is 30. What we are watching is a close above the resistance level on above-average volume.
For RSI itself, go back to the chart and find where the line sits against the 70 line on 2026-10-05. If it were at or above 70, we would show a caution note, not a block. This is an illustration of how we read the method, not a recommendation.
Putting it together
RSI is one lens. Here it sits next to a trend read, moving averages and price levels, and each tells a slightly different part of the story.
Used that way, an overbought reading becomes a question to ask, not an answer to act on.
Common beginner mistakes
- Betting against a stock just because RSI is above 70 in a strong uptrend.
- Acting on an RSI below 30 while the trend keeps falling.
- Comparing RSI values computed with different settings.
- Reading overbought as a forecast of a fall; it describes a move that has run hard and may pause.
When you look at a chart, do you check the trend first or the RSI first, and why?
Answer on XWhere this comes from
Based on the For us Normies library.
For information only. Not investment advice.
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