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Beginner 5 min read

RSI (relative strength index)

A momentum gauge from 0 to 100. It shows stretched conditions and divergences.

703050RSI 14RSI above 70 = stretched up, below 30 = stretched down. In strong trends it can stay there
Illustration for education. Prices are schematic, not real market data.

What it is

The RSI (14) compares recent gains to recent losses on a 0–100 scale. Above 70 is usually called overbought, below 30 oversold. In strong trends it can stay in those zones for a long time, so these are warnings, not automatic reversals.

Divergence is when price makes a new extreme but RSI does not: it shows momentum fading.

How to use it

  1. Use RSI as context, not as a standalone entry.
  2. In ranges, fade extremes with a level and a trigger.
  3. In trends, look for RSI to hold 40–50 on pullbacks (uptrend).
  4. Watch for divergence at key levels.
Overbought can stay overbought. Combine it with structure.

Common mistakes

  • Shorting just because RSI is above 70 in a strong uptrend.
  • Using one RSI setting for every market.
  • Ignoring the timeframe.

Practise it in TradeDesk X

RSI is one of the independent checks in the Scanner’s 20 confluences, and the chart lower pane supports RSI alongside volume and MACD.

Open TradeDesk X Open Micro

Related lessons

Educational content only. Nothing here is financial advice or a recommendation to buy or sell anything. Trading leveraged products can lose more than you deposit. Practise with paper trading first and never risk money you cannot afford to lose.