What Is RSI and How Do Beginners Use It?
RSI, the Relative Strength Index, is one of the first technical indicators almost every beginner runs into. It tries to answer a simple question: has price moved too far, too fast, in one direction? Here is what it measures, what the numbers mean, and the big mistake beginners make with it.
What RSI is
RSI is a momentum indicator that moves between 0 and 100. It compares the size of recent gains to recent losses over a set period (usually 14 candles) and turns that into a single number. A high RSI means price has been rising strongly; a low RSI means it has been falling strongly. It does not predict the future — it describes recent momentum.
Overbought and oversold
- RSI above 70 is often called "overbought" — price has risen sharply and may be due for a pause or pullback.
- RSI below 30 is often called "oversold" — price has fallen sharply and may be due for a bounce.
Notice the word "may". These levels are signals to pay attention, not commands to act. You can see live RSI readings across the top coins on our RSI screener.
How beginners should use it
Use RSI as confirmation, not as a trigger. If you already have a reason to consider a trade, RSI can add context — for example, an oversold RSI lining up with a support level you were watching. It is one input among several, alongside the trend, the level, and — most importantly — your risk management. Whatever RSI says, size the trade with the position size calculator and the 1% rule.
The big mistake
The classic beginner error is treating "overbought" as an automatic sell and "oversold" as an automatic buy. In a strong trend, RSI can stay overbought (or oversold) for a very long time while price keeps going. Traders who short every time RSI hits 70 in a bull market get run over repeatedly. RSI tells you about momentum; it does not tell you the trend is about to reverse. Treat it as one clue, never as a standalone buy or sell signal.
