RSI

RSI (Relative Strength Index) is a momentum oscillator that measures how quickly prices have risen or fallen, typically on a 0–100 scale, to highlight overbought or oversold conditions.

What Is RSI?

RSI (Relative Strength Index) is a momentum oscillator that measures how quickly prices have risen or fallen, typically on a 0–100 scale, to highlight overbought or oversold conditions.

Traders use RSI for exhaustion, confirmation, and divergence — not as a guarantee. In crypto, RSI can stay extreme longer because markets trade 24/7.

RSI diagram with overbought zone above 70 and oversold zone below 30
RSI zones — readings above 70 are often called overbought; below 30 oversold.

Why RSI Matters

  • Momentum readout: Compresses price speed into one line.
  • Overbought / oversold context: Frames when a move may be stretched.
  • Divergence clues: Price vs RSI disagreement can hint at fading trends.
  • Alert-friendly: Numeric thresholds map cleanly to indicator alerts.

How Traders Use RSI

RSI plots beneath the chart. Common zones are above 70 (overbought) and below 30 (oversold), though crypto can sustain extremes.

  • Mean-reversion: Watch RSI leaving an extreme zone.
  • Trend filter: Elevated RSI can persist in strong uptrends.
  • Multi-timeframe: Align higher-timeframe bias with lower-timeframe triggers.

Example: RSI in Practice

A trader wants notice when BTC 1h RSI crosses back above 30 after an oversold dip, so they review the chart without staring at it.

Pro Tip

Create an RSI indicator alert in Phalerta on the interval you trade; deliver via Telegram or mobile.

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Frequently asked questions

What does RSI stand for?

Relative Strength Index — a momentum oscillator, not one coin versus another.

Is RSI above 70 always a sell?

No. Strong trends can keep RSI elevated. Use structure and risk rules.

Can I alert on RSI with Phalerta?

Yes. Build indicator alerts and receive them on Telegram, Discord, Email, or the app.

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