Rotation Momentum Index API

Quantifies the momentum and direction of capital rotation between Bitcoin, Ethereum, and the broader altcoin market — reveals whether liquidity is flowing into majors or expanding toward altcoins.

Webhook URL

https://api.hunchmachine.com/webhook/indicators?indicator=rotation_momentum_index&api_key=YOUR_API_KEY

Description

Quantifies the momentum and direction of capital rotation between Bitcoin, Ethereum, and the broader altcoin market. It tracks how quickly capital is moving across segments — revealing whether liquidity is flowing into majors (BTC-led phases) or expanding toward altcoins.

What this endpoint provides

A short-to-mid-term rotation gauge that measures how market leadership is shifting. It uses changes in BTC dominance, ETH/BTC ratio, and multi-period deltas to identify when rotational momentum is building, fading, or reversing. This indicator helps automations detect early signs of altseason acceleration or BTC-led consolidation.

Response fields

rotation_momentum

Normalized score (0–1) showing the current intensity of rotation momentum. Higher values = stronger directional flow.

momentum_state

Qualitative label (building, cooling, reversing, etc.) describing whether rotation momentum is strengthening or weakening.

trend_direction

Indicates which side currently dominates capital flow — btc rotation (into BTC), alt rotation (into alts), or neutral.

btc_dominance_delta_3d

3-day percentage change in BTC dominance — captures near-term rotation shifts.

btc_dominance_delta_30d

30-day percentage change in BTC dominance — captures medium-term structural trend.

eth_btc

Latest ETH/BTC ratio, a proxy for leadership between Ethereum and Bitcoin.

raw_momentum

Underlying unnormalized score used to compute rotation_momentum.

summary

Preformatted summary combining key datapoints in plain text.

timestamp

UTC time when the indicator was last updated.

Output example

[
  {
    "indicator": "rotation_momentum_index",
    "timestamp": "2025-11-04T14:29:06.237Z",
    "rotation_momentum": 0.2467,
    "momentum_state": "building",
    "trend_direction": "btc rotation",
    "btc_dominance_delta_3d": -0.11,
    "btc_dominance_delta_30d": 0.89,
    "eth_btc": 0.03371,
    "raw_momentum": 0.37,
    "summary": "Rotation momentum building (24.7%). BTC dominance Δ3d -0.11%, Δ30d 0.89%. ETH/BTC 0.03371. Direction: btc rotation."
  }
]

Interpretation & Use

The Rotation Momentum Index captures the velocity and direction of market rotation — showing whether capital is cycling toward or away from altcoins:

• **Low (<0.3)** → Weak or neutral momentum; market indecisive, flows mostly static.

• **Moderate (0.3–0.6)** → Rotation building; liquidity starting to move between BTC, ETH, and alts.

• **High (>0.6)** → Strong rotation; major shifts in leadership, often preceding trend reversals.

Typical patterns:

• **Rising BTC dominance with positive 30d delta** → BTC-led consolidation.

• **Falling BTC dominance and strengthening ETH/BTC** → Alt rotation building.

• **Sharp reversals** → Caution zones; short-term profit-taking or macro catalyst likely.

Used alongside the Altcoin Appetite Index and Altcoin Rotation Radar, this indicator helps quantify how fast and in which direction the market is rotating.