The Relative Strength Index (RSI), introduced by J. Welles Wilder in 1978, was designed for markets that were:

• slower
• less volatile
• dominated by discretionary traders

Modern markets (2024–2025) look very different:

• crypto trades 24/7
• equities are driven by ETF flows and options gamma
• algorithms dominate short-term price action

As a result, the classic RSI(14):

• stays “overbought” for long periods in strong trends
• generates false reversal signals
• performs poorly during volatility regime shifts

RSI itself is not broken — static interpretation is.

Purpose: RSI must always be interpreted in context. Price defines trend, structure, and regime. RSI is secondary.

Yet Another Improved RSI (YAI-RSI) is not a new oscillator. It is a framework for reading momentum in a regime-aware way.

Core principle:

Momentum must adapt to volatility and market regime.

Key improvements:

1. Adaptive lookback period
2. Noise reduction through smoothing
3. Dynamic overbought / oversold zones
4. Context-based interpretation

Classic RSI (30 / 70)

Observation:

• frequent false signals
• RSI pinned between 60–70 in trends
• late reactions to regime changes

This illustrates why fixed thresholds fail in modern markets.

Instead of a fixed period, YAI-RSI adjusts dynamically:

• High volatility → longer lookback
• Low volatility → shorter lookback

This allows RSI to:

• ignore noise during macro volatility
• respond faster during accumulation phases

Key insight: RSI structure becomes smoother, more stable, and trend-aligned.

Modern markets are trend-persistent, not mean-reverting.

Typical RSI behavior:

• Bull regime: support at 40–45, resistance 75–80
• Bear regime: resistance 55–60, exhaustion 20–25

RSI should be read relative to regime, not absolute values.

Interpretation:

• Compression → energy buildup
• Expansion → momentum release

RSI volatility often leads price volatility.

In strong trends:

• RSI does not revert to 30
• it forms a rising “floor”

This floor defines trend health.

Bullish RSI Floor

Rule of thumb:

• RSI holds above floor → trend intact
• RSI breaks floor → regime change

Today’s price action is driven by:

• capital flows
• options hedging
• passive investment vehicles

YAI-RSI works best as a pressure gauge, not a timing tool.

• RSI is not obsolete — static RSI is
• Momentum must adapt to volatility
• RSI should confirm regimes, not predict reversals