A flat altcoin gained 22% against Bitcoin in the month Glassnode's signal hit 86

Run the June print backwards. An altcoin that did nothing at all in dollar terms gained about 22% against Bitcoin over a month in which Bitcoin fell 18%, because one divided by 0.82 is 1.22 ^[14]. Glassnode said much the same in its own words. The firm flagged that the move was driven significantly by Bitcoin's pullback and not by explosive, independent demand for altcoins ^[4], and it described altcoins as having "run out of sellers" after nearly two years of sustained downward pressure, according to Cryptobriefing ^[5].

A market with no sellers left can rise on very little buying. That is a weaker claim than capital arriving. The July 4 update is where Glassnode made the stronger one, keeping the signal in altcoin season territory with what the firm characterised as genuine strength on both a relative and an absolute basis ^[6]. Cryptobriefing described that as a capital-expansion dynamic beginning to take hold ^[13].

Then the September data arrived. Total altcoin market capitalisation was up roughly 21% month over month by mid-September ^[7], which is an absolute figure and not a ratio. Cryptobriefing gave that percentage without a dollar figure for the market cap. The caution had moved to the financing side. Altcoin open interest stayed substantially below Bitcoin's, meaning traders were not borrowing aggressively to amplify their positions ^[8], and the crowd of momentum traders who typically pile in mid-cycle had not shown up ^[12].

The vendors also stopped agreeing. Glassnode's 86 sat 36 points above its own 50 line ^[15], while CoinMarketCap's Altcoin Season Index was around 45 in September, technically still in Bitcoin-dominance territory ^[9]. The two are constructed differently, track different baskets of assets and weight performance over different time windows ^[10]. Cryptobriefing wrote that two reputable analytics providers were looking at the same market and arriving at different conclusions ^[11].

In my view the June reading is a statement about Bitcoin's month. A ratio with a falling denominator moves whether or not anyone buys the numerator ^[2]. The counter-thesis is Glassnode's own July revision, and it is serious: relative and absolute strength together, then a 21% month, is what the early part of a rotation looks like. The thin leverage says the position is not yet crowded. Altcoin dollar market cap could keep climbing through a Bitcoin recovery while the Glassnode signal slides back under 50 at the same time. That would show the dollars moved and the ratio simply stopped describing it, and Cryptobriefing named that exact possibility ^[16].