Mastering Impulse Waves

A valid impulse wave consists of five waves (1-2-3-4-5) with waves 1, 3, and 5 moving in the trend direction. It obeys all three cardinal rules. Wave 3 is typically the longest and most powerful. Wave 2 and Wave 4 alternate in character (sharp vs. sideways). The overall structure shows clear directional momentum.

Impulse waves appear at every degree of trend—from multi-year primary waves on monthly charts to hour-long minute waves on 5-minute charts. The same identifying characteristics apply at all degrees.

Three rules are absolute: Rule 1—Wave 2 cannot retrace more than 100% of Wave 1. Rule 2—Wave 3 cannot be the shortest of Waves 1, 3, and 5. Rule 3—Wave 4 cannot overlap Wave 1’s price territory in a standard impulse.

Guidelines (common tendencies): Wave 2 often retraces 61.8% of Wave 1. Wave 3 often extends to 161.8% of Wave 1. Wave 4 often retraces 38.2% of Wave 3. Waves 2 and 4 tend to alternate in form (if Wave 2 is a sharp zigzag, Wave 4 tends to be a flat or triangle).

While all impulse waves follow the same rules, they appear in several forms: Standard Impulse—the most common, with Wave 3 as the extended wave. Extended Third Wave—Wave 3 extends dramatically, often reaching 261.8% of Wave 1; the most powerful and profitable formation.

Extended Fifth Wave—Wave 5 extends beyond normal expectations; often ends with RSI divergence. Terminal Impulse (Ending Diagonal)—a wedge-shaped impulse where Wave 4 overlaps Wave 1; signals exhaustion of the trend.

Key differences: Impulse waves show clear directional momentum; corrective waves are choppy and overlapping. Impulse waves subdivide into five waves; corrective waves subdivide into three. In impulse waves, Wave 4 does not overlap Wave 1; in corrective waves, overlap is common.

Practical rule: if you’re seeing overlapping waves, sideways chop, and lack of directional momentum—you’re in a correction. If you’re seeing clean directional moves with clear wave structure and no overlap—you’re in an impulse.

Once Wave 2 has completed, a trader can project: Wave 3 target (161.8% extension of Wave 1); Wave 3 maximum extension (261.8% or 423.6% if extended); Wave 4 retracement zone (38.2% of Wave 3); Wave 5 target (equal to Wave 1, from Wave 4 low).

This provides a complete roadmap of the entire five-wave sequence before it completes—allowing traders to plan entries, partial exits, and final exits in advance.

The three highest-probability entries: Wave 2 Entry—enter at the end of Wave 2 with stop below Wave 1 origin, targeting Wave 3 (161.8%). This is the highest risk-reward entry. Wave 4 Entry—enter at Wave 4’s end with stop below Wave 1 high, targeting Wave 5.

For all entries: confirm with RSI (look for divergence at wave extremes), check volume (should be highest in Wave 3), and confirm Fibonacci alignment (entry price at a Fibonacci retracement level).

The ideal entry is at the precise completion of a corrective wave (Wave 2 or Wave 4), not during the impulse itself. Wait for the correction to complete before entering—entering during an ongoing correction risks buying into further downside.

Signs that a correction is completing: RSI reaches oversold; price reaches key Fibonacci retracement (50% or 61.8% for Wave 2; 38.2% for Wave 4); corrective wave shows its own completion pattern; volume dries up during correction and expands on the first reversal candle.

RSI should show higher highs in Wave 3 vs. Wave 1 (momentum expansion); may show lower highs in Wave 5 vs. Wave 3 (divergence—exhaustion signal). MACD histogram should peak during Wave 3; declining in Wave 5 warns of exhaustion.

Volume should expand during Waves 1, 3, and 5 and contract during Waves 2 and 4. ATR tends to expand during Wave 3 (highest volatility) and contract during Wave 4.

The most common mistakes: Counting a three-wave move as five waves; Ignoring the Wave 4/Wave 1 overlap rule; Labeling every strong move as Wave 3 without confirming overall context; Missing Wave 2 and entering too late during Wave 3.

Impatient traders often miss the best entry (Wave 2 low) and enter during Wave 3, accepting a worse risk/reward ratio. Discipline to wait for the correction to complete is essential.

Mastering impulse waves is the foundation of profitable Elliott Wave trading. The five-wave structure—with its clear rules, Fibonacci relationships, and characteristic momentum signature—provides some of the most reliable trade setups available.

Focus on identifying Wave 2 completions for the highest risk-reward entries, confirm with Fibonacci retracement levels and RSI, and always respect the cardinal rules as absolute boundaries for your wave counts.