On October 17, according to Coinmarketcap data, the Altcoin Season Index fell to 25, after rising to 78 on September 20, averaging 35 last week, and 71 last month. The index shows that over the past 90 days, approximately 25 of the top 100 cryptocurrencies by market capitalization have outperformed Bitcoin.
Note: The CMC Crypto Alt Seasonal Index is a real-time indicator used to determine whether the current cryptocurrency market is in an Altcoin dominated season. The index is based on the performance of the top 100 Altcoin relative to Bitcoin over the past 90 days.