Traders hear Tokyo, London and New York constantly-but sessions are about when participation and liquidity tend to cluster, not about a single magic clock. This guide explains sessions and “killzones” in plain language, relates them to overlaps, and separates that idea from session segmentation in your journal. For analyzing your own results by session, start there; for a compact live reference on the Calculator, see the Session Clock section below.
What Are Market Sessions?
Global markets run continuously for many assets, but human and institutional rhythm still concentrates around major financial centres. A session is a coarse label for those periods-typically Asia-Pacific morning through regional closes, European hours, and US hours-when quoted prices, news flow and order flow often behave differently than at quiet times.
Sessions help you reason about context: volatility, spread behaviour, and whether major headlines are likely to land. They do not replace edge, discipline or risk math.
Tokyo, London and New York
Tokyo (broadly Asia-Pacific) often sets tone after the US close; London brings European liquidity and overlaps with late Asia; New York drives US equities, USD flow and many macro releases. Each centre has local holidays and microstructure-so any simplified clock is a reference model, not a contract specification for every instrument.
Killzones and Overlaps
In online trading education, killzone usually refers to short intervals-often around opens or when two major centres are both active-where traders watch for liquidity sweeps, volatility or scheduled risk events. The word is slang, not a technical indicator; definitions vary by mentor and asset class.
Overlaps (e.g. London and New York both open) are widely discussed because participation from two hubs can combine. Again: higher activity can mean wider swings either way-context, not a promise of edge.
Journal Session Stats vs Session Clock
In Eyes On You, Session Performance is analytics: it buckets your closed trades by entry time (UTC) into segments such as Asia, London, New York and overlaps. That tells you where your edge shows up-see Segment Trading Performance by Day, Session and Setup.
The Session Clock on the Calculator is different: it is a live informational widget (desktop-only) with simplified local session and lunch windows per hub (IANA timezones, DST-safe via Intl). It does not read the journal, AI Performance Intelligence or strategy insights. Use it for situational awareness next to sizing-not as a substitute for your stats.
EOU Session Clock on the Calculator
On large desktop breakpoints, the home Calculator shows a Session Clock panel with Tokyo, London and New York. The header shows UTC and your current timezone; each card shows that hub’s local time, local session, Core Hours, and lunch bands, and a state badge (Closed, Lunch, or Open). Closed means outside that hub’s session window (not an in-session “priority”); when in session, lunch applies before open hours resume. When two hubs are both in session, both cards read OPEN. There is no separate overlap badge. Saturday and Sunday in each hub’s local calendar treat that hub as closed for this widget. Colours encode state (active, inactive, lunch)-not a permanent colour per city.
Implementation lives in lib/sessionClock.ts and components/session-clock/; updates tick about once per minute. For position sizing and stops, use the Calculator; Session Clock stays contextual only.
Final Thought
Sessions and killzones are schedule and liquidity context. Your journal tells you what actually worked for your trades over time. Use both: context on the clock, evidence in the numbers-without confusing the two.
Frequently Asked Questions
- What is a trading session?
- A trading session is a recurring window of time when a major financial centre is typically most active-often tied to local exchange hours and institutional flow. Globally, traders refer to Asia (often anchored on Tokyo), London and New York as broad ‘sessions’ even when assets trade almost 24 hours.
- What is a killzone in trading?
- ‘Killzone’ is informal trader language for short windows-often around session opens or overlaps-when liquidity and volatility tend to cluster. It is not a guarantee of profit; it is context about participation. Different educators define exact windows differently.
- Does EOU Session Clock tell me when to trade?
- No. It shows informational session timing and status: per-hub Open, Closed, and Lunch in our simplified local model (with Core Hours and lunch bands on each card). When two hubs are both in session, both cards read Open; there is no separate overlap badge. It does not produce signals, sizing or entries. Always combine context with your plan, risk rules and journal data.
- Is Session Clock the same as Session Performance in the Journal?
- No. Session Performance segments your closed trades by UTC hour buckets (Asia, London, overlaps, etc.). Session Clock is a live desktop widget on the Calculator page using simplified local session and lunch hours per hub (Asia/Tokyo, Europe/London, America/New_York, DST via Intl)-it does not read your trades.