99Bitcoins Market Indices

Four readings we compute ourselves from our own market snapshots — a capitalisation index, a sentiment score, an altcoin-season gauge and the dominance split. No third-party widgets.

How they are built

99BTC 20 Index

Top 20 by market cap

$1.85T

-0.34% 24h

Index level

A capitalisation-weighted index of the twenty largest assets in our coverage, recomputed on every market snapshot. It moves with the part of the market that actually carries weight, which makes it a cleaner read on direction than a simple average across hundreds of coins.

Updated 6 tuntia ago99Bitcoins composite index, recomputed every 30 minutesMethodology

Fear & Greed

0–100

43 Fear

Seven-day history. Below 25 is extreme fear; above 75 is extreme greed.

Altcoin Season

30D

33 Bitcoin Leading

Beat BTC (30d): 13 / 40
7-day reading: 28
BTC 30d: +0.40%

Share of the top 50 (Bitcoin and stablecoins excluded) that outperformed BTC.

Dominance Split

Live

BTC 58.2% ETH 10.3% Stables 12.7% Others 18.8%

Breadth: 38%
Advancing: 34
Declining: 40

Share of total tracked capitalisation, with dollar-pegged assets separated out so the altcoin share is not overstated.

Market Aggregates

Thirty days of the four numbers that describe the whole market.

Total Market Cap

$2.23T -0.30%

24h Trading Volume

$75.68B -6.21%

Total Value Locked

$789.28B -0.05%

Unique Active Wallets 24h

4.42M -0.11%

Updated 6 tuntia agoCoinGecko · DefiLlama · growthepie, snapshotted every 30 minutesMethodology

Why we compute our own indices

Embedding somebody else's widget means inheriting their coverage, their refresh cadence and their outages. Every index on this page is derived from snapshots we captured and stored ourselves, which means we can state precisely what went into it, show its history, and keep serving the last known good value when an upstream source has a bad hour.

Definitions

99BTC 20 — summed market capitalisation of the twenty largest tracked assets, recorded on each snapshot.
Fear & Greed — a 0–100 composite of volatility, momentum, volume and breadth.
Altcoin Season — the share of the top 50 assets, excluding Bitcoin and stablecoins, that outperformed Bitcoin over the window.
Dominance — each group's market capitalisation as a share of total tracked capitalisation.
Breadth — the share of tracked non-stablecoin assets trading higher than 24 hours ago.