• Bitcoin dominance broke below midline support of an ascending broadening wedge, stabilizing near 55%.
• Altcoin Season Index is at 67, showing altcoins outperform Bitcoin across the past 90 days.
• The index rose from 54 a month ago, peaking at 70 last week, with a yearly high of 87.

Bitcoin dominance has formed an ascending broadening wedge over several months, with higher highs and higher lows defining the pattern. At its peak, dominance touched the upper boundary multiple times before reversing course. Successive lower highs then appeared, shaped by rounded tops visible on the chart. The movement shifted momentum as the formation began to lose strength across the midline.

Consolidation Near 55% and Historic Prints

A deeper view of Moustache analysis indicates that the chart records a breakdown below the midline support line. After the fall, dominance stabilized around 55%. This consolidation is centered within the yellow-marked region, where dominance repeatedly tested the wedge’s lower boundary. Price movements there showed attempts to establish a footing while remaining close to the long-term support line.

The accompanying inset shows the broadening wedge model, with projected outcomes pointing toward downward continuation. If dominance moves below support, further declines remain possible. Previous market cycles illustrate how reductions in Bitcoin’s share created openings for alternative cryptocurrencies. 

A similar scenario could emerge if current levels fail to hold. During earlier rallies, Bitcoin maintained a majority share before sharp retracements. Those periods shifted market participation toward altcoins. The present structure indicates a risk that dominance may weaken further after months confined inside the wedge.

Altcoin Season Index Records 67 as Market Momentum Favors Altcoins

As the BTC dominance brings an ascending broadening wedge in the market, the CMC Altcoin Season Index is holding at 67 out of 100, placing conditions firmly within Altcoin Season. This reading evaluates the performance of the top 100 altcoins compared with Bitcoin over the last 90 days. Recent data shows yesterday’s index closed at 67, identical to the current level. 

Last week’s value was 70, while the index measured 54 one month earlier. This progression reflects a steady upward trend across the past month. The yearly high was 87 on December 4, 2024, indicating a stronger altcoin cycle. The yearly low, recorded on April 26, 2025, was 12, representing Bitcoin Season conditions. 

The chart displays the index rising from mid-July, climbing to higher ranges by September. Altcoin market capitalization has also advanced steadily, showing peaks that align with index strength. With the index positioned at 67, altcoins have consistently outperformed Bitcoin during the recent quarter.