The vessel-flow edge.
Free, on one screen.
Vessel flows as a physical leading indicator for freight & energy, on one screen with EIA fundamentals, the Brent-WTI spread, and the tanker pressure index — built for swing and macro positioning, not intraday. 5 ports tracked. Free, no account.
Everything a macro trader needs in one place
Real-Time AIS Vessel Tracking
Live vessel counts, anchored ratios, and congestion scores updated hourly across major energy ports using AIS transponder data.
EIA Fundamentals & Spreads
Live EIA crude / Cushing / distillate inventories, Brent-WTI spread, and 3-2-1 crack spread — the macro view, in one panel.
Floating Storage Detection
Identifies laden tankers sitting at anchor across US Gulf, Rotterdam, and Singapore — a leading indicator of oversupply.
Chokepoint Watch — Hormuz
Live transit count, tanker / LNG class split, and 24h AIS gap (dark fleet) tracker for the Strait of Hormuz.
Tanker Pressure Index
Proprietary composite of FRO, DHT, INSW, and TNK price action — the equity market's read on tanker freight conditions.
Systematic Signal Briefs
A rule-based engine maps vessel anomalies to correlated tickers and emits directional signals with entry, invalidation, and a 5–10 day horizon.
5 Ports Monitored 24/7
Deep coverage of the highest-volume flows in energy and freight — the US Gulf export complex (Houston, Sabine Pass), Europe's Rotterdam hub, and the West Coast container gateway.
LA / Long Beach
Container hub
Largest US container port
Singapore
Oil & container
Global bunkering capital
Rotterdam
Energy & mixed
Europe's largest port
Houston
Energy hub
US crude & LNG exports
Sabine Pass
LNG terminal
US LNG export leader
How it works
AIS data collected
Every hour, HarborSignal pulls live vessel positions from AIS transponders at each monitored port and chokepoint.
Anomalies detected
The backend compares the latest snapshot to the rolling baseline. Significant changes in vessel count or congestion score trigger a signal.
Engine maps to tickers
A rule-based engine reads the anomaly alongside port-specific context (what cargo flows through, which tickers are correlated) and emits a plain-English signal with entry and invalidation — no black box.
You trade smarter
Signals are published to the dashboard with confidence scores, affected tickers, and the specific reasoning — no black box.
Get the morning brief before the open
The daily energy brief — vessel-flow signals and the physical flows that can lead price. When Singapore floods with tankers or Houston congestion spikes, you'll read it first. Free, one email a day.
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Or explore the live dashboard →HarborSignal is a free, general-purpose energy market intelligence publication. Signal briefs are systematic pattern analysis on vessel and price data, not financial advice, and are not produced by a licensed investment adviser or commodity trading adviser. Past patterns do not guarantee future results. Legal & Risk Disclosures