Altcoin BTC-Relative Performance — Alt Season Indicator

Altcoin BTC-Relative Performance ranks 488+ altcoin/BTC pairs by their 24-hour returns against Bitcoin using live Binance data. Computes change_vs_btc_pct for every pair, identifies top gainers/losers/volume leaders, and outputs a market breadth signal (strong_altseason to strong_btc_dominance) as a real-time alt season indicator. No API key required. $0.005/run flat.

When altcoins broadly outperform Bitcoin, capital is rotating from BTC into alts — historically the highest-return phase of a crypto bull cycle. This actor quantifies that rotation in real time with a single market_breadth_pct number and actionable signal labels.

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Why use Altcoin BTC-Relative Performance?

1. Early alt season detection — market_breadth_pct ≥ 70% signals strong_altseason. Catching this before the crowd is what creates outsized altcoin returns — this actor gives you a quantitative trigger.
2. Rotation opportunity screening — Individual change_vs_btc_pct values show which sectors or L1s are leading rotation. SOL, AVAX, and MATIC each have their own moments — this data reveals them.
3. Systematic allocation decisions — Use signal as a binary switch: altseason → increase altcoin allocation; btc_dominance → rotate back to BTC. Automate without emotional decision-making.
4. Volume-weighted watchlist filtering — minVolumeBtc excludes micro-caps with fake pump percentages. Focus only on liquid pairs where moves mean something.
5. Time-series alt season database — Schedule hourly runs and build a historical market_breadth_pct chart. The trend of the breadth signal is more valuable than any single snapshot.

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How to use

1. Open the actor on Apify Store and click Try for free.
2. Set topN (default 30) for how many gainers/losers/volume leaders to return.
3. Set minVolumeBtc (default 1.0 BTC) to exclude illiquid micro-caps.
4. Set includeStables: false to exclude stablecoin pairs from rankings.
5. Click Start — results arrive in under 30 seconds. First record is always the market_summary.

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Input

Field	Type	Default	Description
topN	integer	30	Number of results per category (gainers/losers/volume leaders)
minVolumeBtc	number	1.0	Minimum 24h BTC volume to include a pair
includeStables	boolean	false	Include stablecoin/BTC pairs in rankings

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Output

[
  {
    "_type": "market_summary",
    "btc_price_usd": 62450.30,
    "btc_change_24h_pct": 1.82,
    "market_breadth_pct": 68.4,
    "signal": "altseason",
    "total_pairs_analyzed": 488,
    "timestamp_utc": "2026-09-02T09:00:00Z"
  },
  {
    "_type": "altcoin",
    "rank_type": "top_gainer",
    "rank": 1,
    "symbol": "SOLUSDT",
    "base_asset": "SOL",
    "change_24h_pct": 8.45,
    "change_vs_btc_pct": 6.49,
    "volume_24h_btc": 12340.5,
    "volume_24h_usd": 770668335.0
  }
]

Market breadth signal bands

Signal	market_breadth_pct	Interpretation
strong_altseason	≥ 70%	Most alts beating BTC — peak rotation
altseason	55–70%	Alt-favorable conditions
mixed	45–55%	No clear trend
btc_dominance	30–45%	BTC outperforming most alts
strong_btc_dominance	< 30%	Strong BTC relative strength

Key output fields

Field	Description
market_breadth_pct	% of pairs where altcoin beat BTC in 24h
change_vs_btc_pct	Altcoin 24h % minus BTC 24h %
rank_type	top_gainer, top_loser, or volume_leader
volume_24h_btc	24h trading volume in BTC

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Cost estimation

Flat $0.005 per run — all 488+ pairs analyzed regardless of topN.

Usage pattern	Runs/month	Monthly cost
Daily alt season check	30	$0.15
Hourly market breadth tracking	720	$3.60
Weekly research snapshot	4	$0.02

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FAQ

How is change_vs_btc_pct calculated? change_vs_btc_pct = altcoin 24h% − BTC 24h%. Positive = outperformed BTC; negative = lagged. market_breadth_pct is the share of all filtered pairs with positive change_vs_btc_pct.

Why does alt season matter if I just hold BTC? Alt season signals capital rotation out of BTC into smaller caps — BTC dominance falling usually means BTC price goes sideways or slightly down while alts 2–10x. Monitoring the signal helps decide when to diversify into higher-beta positions.

Can I exclude specific coins? includeStables: false handles stablecoins/wrapped tokens. For custom exclusions, download all results and filter by symbol in your code.

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Related actors

• Crypto Whale Flow Monitor — On-chain whale flows that often precede alt rotation
• Social Sentiment Aggregator — Reddit + Fear & Greed sentiment to confirm alt season thesis
• Long/Short OI Aggregator — Open interest positioning data to complement price-based alt season signals

Disclaimer: This actor is for informational and research purposes only and does not constitute financial advice.

Feedback

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Keywords: altcoin vs BTC, altcoin performance, Bitcoin relative performance, altcoin gainers, altcoin losers, crypto rotation, altcoin season signal, Binance trading pairs, altcoin tracker, BTC outperformance, altcoin momentum, crypto market breadth, altcoin volume, market rotation signal, crypto portfolio tracking