What is RSI (Relative Strength Index)?
RSI is a momentum oscillator that measures the speed and magnitude of price changes. It ranges from 0 to 100:
- Above 70 — Overbought (potential sell signal)
- Below 30 — Oversold (potential buy signal)
- Around 50 — Neutral momentum
Developed by J. Welles Wilder in 1978, RSI remains one of the most widely used indicators in crypto trading.
Classic RSI Mean Reversion Strategy
The simplest RSI strategy buys when the market is oversold and sells when overbought:
Buy when: RSI(14) < 30
Sell when: RSI(14) > 70
Stop Loss: 1.5x ATR below entry
Take Profit: 2:1 risk-reward ratio
This works best in ranging markets where price oscillates between support and resistance levels.
RSI Divergence: The Advanced Signal
RSI divergence occurs when price and RSI move in opposite directions:
- Bullish divergence: Price makes lower lows, but RSI makes higher lows → potential reversal up
- Bearish divergence: Price makes higher highs, but RSI makes lower highs → potential reversal down
Divergence signals are stronger on higher timeframes (4h, daily).
Backtest Your RSI Strategy with AI
Instead of manually coding your RSI strategy, you can use u2Algo's AI Strategy Builder:
- Go to Strategy Builder
- Type: "RSI mean reversion strategy for BTCUSDT on 4h timeframe. Buy below 30, sell above 70. ATR-based stop loss."
- Click "Generate Strategy"
- Review the AI-generated Python code
- Run backtest against real Binance data
The AI handles all the complexity — Wilder smoothing, NaN handling, position sizing, and exit logic.
Common RSI Mistakes
- Using RSI alone — Always combine with trend analysis or support/resistance
- Trading against the trend — RSI oversold in a downtrend can stay oversold for weeks
- Fixed periods — RSI(14) is default, but RSI(7) for scalping or RSI(21) for swing trading may work better
- Ignoring volume — High-volume RSI signals are more reliable
Try It Yourself
No coding required. No credit card needed.