The altcoin market's strongest breadth recovery in months has weakened sharply, raising questions about whether the rally that unfolded between late August and early October can still qualify as a sustained altcoin season. CryptoQuant analyst Darkfost reported on October 18 that just 51.6% of altcoins tracked on Binance remained above their 200-day moving averages, down from more than 90% at the start of the month. The decline means broad market participation has nearly halved within a matter of weeks.

The Altseason Is cooling fast as Altcoin breadth drops from over 90% to around 52%

Between late August and early October, altcoins went through a brief altseason, which is now starting to fade.

To measure these favorable periods, the number of altcoins trading above their… pic.twitter.com/Er6yvb4evn

— Darkfost (@Darkfost_Coc) October 18, 2026

Source: Darkfost on X

The analyst's metric tracks the share of altcoins listed on Binance that are trading above their 200-day moving averages, a benchmark widely followed as a gauge of longer-term price direction and commonly used to separate sustained uptrends from downtrends. When fewer assets trade above it, gains become less widespread across the market, even if individual cryptocurrencies remain resilient. Unlike a single token's price chart, the measure captures how much of the market is actually participating in an uptrend rather than the performance of one asset. A reading near the 50% mark therefore describes a market divided almost evenly between assets above and below their long-term averages.

Binance Altcoin Breadth Falls From Over 90% to 51.6%

The collapse in breadth followed a rapid improvement that began in late August, when 81% of tracked assets were trading below their 200-day averages. By September 19, roughly 70% had climbed back above the benchmark, marking the strongest breadth reading since October 2025. Alongside that recovery, altcoin market capitalization excluding Ethereum surpassed $800 billion.

The share of assets above the moving average reached 87% by September 28, before exceeding 90% in early October. Warning signs emerged before the downturn, however. Darkfost flagged rising exchange deposits and weakening momentum, with weekly deposit transactions topping 22,700 on Binance and 8,300 on Coinbase. Exchange deposits can precede sales, although they do not prove that selling occurred. The latest figures show 48.4% of tracked altcoins sitting below the benchmark, compared with fewer than 10% earlier in October.

$134B Altcoin Retreat Deepens Concerns as Season Index Hits 54

Darkfost estimated that more than $814 billion entered the altcoin market during the preceding two-month upswing. He also reported over $134 billion leaving the sector across the most recent 15 days. Those amounts, however, were described as capital movements without distinguishing actual net inflows from changes in market capitalization. The distinction matters, because falling valuations do not necessarily indicate that an equivalent sum was withdrawn.

Other widely followed measures also fall short of confirming a full-fledged altcoin season. At press time, CoinMarketCap's Altcoin Season Index stood near 54, below the 75-point threshold the platform uses to confirm that altcoins are consistently outperforming Bitcoin. Meanwhile, Bitcoin dominance — the largest cryptocurrency's share of the total market — remained around 60.1%, while Bitcoin's price hovered near $81,500. BlockchainCenter's separate index likewise sat below the level associated with sustained altcoin outperformance, providing another check on how far the rally extended beyond individual price gains. A dominance figure above 60% means roughly three-fifths of total market value sat in Bitcoin at the time of the reading.

Taken together, the readings establish weaker market participation rather than a definitive end to the cycle. A renewed breadth recovery would require a larger share of assets to regain their long-term averages. The indicators behind these readings — the Binance breadth share, exchange deposit volumes, the distance between the Altcoin Season Index and its 75-point confirmation bar, and Bitcoin dominance — are updated on a recurring basis, giving observers a concrete set of measures to follow as the market absorbs the October pullback.