According to CoinMarketCap (CMC) data, the CMC Altcoin Season Index currently stands at 43, reflecting an increase of 3 points compared to the previous day. The index measures market performance by analyzing the top 100 cryptocurrencies by market capitalization, to determine whether the market is in an altcoin season or remains Bitcoin-dominated.Over the past 90 days, 43 of these altcoins have outperformed Bitcoin in terms of price growth, signalling a [weakening/strengthening] altcoin trend.The CMC Altcoin Season Index is a key crypto market indicator used to determine whether the current cryptocurrency market is in an altcoin-dominated season. It is based on the performance of the top 100 altcoins relative to Bitcoin over the past 90 days