Direct answer
Forex does not trade only during fixed “opening hours” like some stock exchanges. In practice, the “New York session” refers to the period when trading activity is commonly centered around the New York time zone (New York local time). The exact start and end can vary by definition used by different sources, so treat the session as a time window rather than a single official clock.
Explanation: what “market hours” means here
In FX, “hours” typically means one of these:
- Broker/venue trading availability: many platforms allow trading nearly continuously, but spreads, liquidity, and execution quality can change.
- Session windows: popular market education frameworks group activity into regional sessions (Sydney/Tokyo, London, New York, and sometimes Asia/Europe/Americas overlaps). The New York session is one such window.
“New York session hours” are usually given as a start-to-end range in New York time. Different references may shift the printed times because they may rely on different time-zone conventions or different assumptions about when liquidity is “most concentrated.” Because of this, your safest assumption is: the New York session is defined relative to New York local time, but the precise clock times can differ by source.
If you want a consistent way to map the session to your chart, use these inputs:
- Your platform’s chart time zone setting (e.g., broker time vs. UTC).
- A single session-hours reference that states the time zone it uses.
- The understanding that FX can remain liquid outside the window due to global overlap.
Example and independent checks
A practical check is to pick a reference that lists a New York session time window and then verify it against your chart:
- Put a timestamp on a notable event or simply note when the market becomes more active.
- Compare that behavior with the session window in the same time zone.
- If your chart is not in New York time, convert the session window to your chart’s time zone before concluding anything.
Another check is overlap awareness. Even if the New York window has an end time, trading activity often changes gradually as other regions overlap. So, “end of session” should be treated as a liquidity shift, not a hard on/off switch.
Limitations and risks
- No single universal official hour range: “session hours” are a conventional framework for describing activity patterns, not a guarantee of tradability.
- Source differences: two reputable educational sources may list slightly different start/end times due to time-zone handling and liquidity assumptions.
- Activity outside the window: major news releases and global connectivity can affect FX pricing even when the New York session window is not active.
- Verification is required: for anything you plan to measure, confirm the time zone used by your chart and the session-hours reference.
If you share which session-hours table you are using and what time zone your platform displays (or whether it uses UTC/broker time), you can reconcile the window precisely without relying on assumptions.