RSI FAQ: 12 Questions Traders Search About RSI
RSI (Relative Strength Index) is one of the most-used and most-misunderstood indicators. Here are the answers I wish I'd had when I started.
What does RSI mean?
Relative Strength Index. It's a momentum oscillator that ranges from 0 to 100, measuring how fast and how much a price has moved over a lookback period (typically 14 bars).
What is the standard RSI setting?
14 periods. It's the default Wilder published in 1978 and what virtually every charting platform uses out of the box. Some intraday traders use 7 or 9 for faster signals.
What does RSI above 70 mean?
Conventionally, 'overbought' — meaning the price has moved up a lot, fast. But overbought doesn't mean 'about to drop.' In strong trends, RSI can stay above 70 for weeks while price keeps climbing.
What does RSI below 30 mean?
Conventionally, 'oversold.' Same caveat: oversold doesn't mean a bounce is coming. In downtrends, RSI stays below 30 for extended periods. RSI is a momentum gauge, not a timing signal.
What is RSI divergence?
When price makes a new high (or low) but RSI fails to. Bullish divergence = price lower low, RSI higher low. Bearish divergence = price higher high, RSI lower high. It often precedes a trend pause, not necessarily a reversal.
Is RSI a reliable indicator?
Reliable for measuring momentum strength, not for timing entries by itself. A 14-period RSI crossing 70 has positive predictive value for short-term reversals only in range-bound markets; in trends, it's a coin flip.
Can RSI predict tops and bottoms?
It can hint, not predict. Extreme RSI values combined with divergence and a chart structure (e.g., a clear resistance) are stronger than RSI alone. By itself, RSI is right about reversals roughly 50-55% of the time.
What's the difference between RSI and Stochastic?
RSI compares average gains to average losses over a period. Stochastic compares the current price to the high-low range over a period. Stochastic is more responsive — it whipsaws faster. RSI smooths more.
How do I use RSI for day trading?
Most intraday RSI users either tighten the period (7 or 9) or use a different threshold like 80/20. The smaller period responds faster but creates more false signals. There's no setting that fixes the underlying problem: RSI is a lagging indicator.
Does RSI work for crypto?
Same indicator, same interpretation. Crypto's higher volatility means RSI hits extremes more often and stays there longer. The threshold values (70/30) don't translate cleanly — many crypto traders use 80/20 or 85/15.
Why is RSI not working for me?
Three usual reasons: (1) you're using it in a trending market where it stays extreme, (2) you're trusting one indicator alone, or (3) you're acting on the threshold cross rather than the broader chart context.
Should I combine RSI with other indicators?
Yes, with one not three. RSI + price structure is enough. RSI + MACD + Bollinger + EMA gets you analysis paralysis and conflicting signals. Pick a momentum indicator and a trend indicator — that's your toolkit.
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