Short answer: the forex market is a decentralised, over-the-counter global network — not a single exchange with a physical trading floor — where banks, institutions, and individual traders buy and sell currencies against each other, 24 hours a day on weekdays, through three overlapping regional trading sessions. This structure — no central exchange, no fixed hours, and prices formed continuously across a global network — is genuinely different from how most beginners initially picture a financial market, and understanding it well pays off in practical trading decisions later in this guide. Understanding this structure explains a lot about why forex behaves the way it does: why it never technically "closes" during the week, why liquidity and volatility change dramatically depending on the time of day, and why price can move sharply around scheduled economic events. This guide builds on our what is forex trading introduction, going deeper into the mechanics of the market itself.
There is no single forex exchange
Unlike a stock market with a central exchange (like the NSE or NYSE) where all trades funnel through one venue, forex is an over-the-counter (OTC) market — trades happen directly between participants, or through networks of banks and brokers, rather than on a centralised trading floor. This is a genuinely important structural difference: there's no single "official" forex price at any given moment in the way there's a single last-traded price on a stock exchange. Instead, prices are formed continuously across a decentralised network of banks, financial institutions, and electronic trading platforms, all quoting prices to each other and to their clients based on supply, demand, and their own risk positions.
The interbank market: where prices actually originate
At the top of this network sits the interbank market — the largest banks in the world trading currencies directly with each other in enormous volumes, effectively setting the wholesale rates that everything downstream is priced from. Your broker doesn't invent the price it shows you; it derives it from this interbank activity (directly, through liquidity providers, or through its own internal pricing engine, depending on the broker's model), adds its own spread or commission, and passes that price to you. This is why prices across different brokers for the same pair at the same moment are generally very close but not always identical — each broker's specific pricing sits slightly downstream of the same underlying interbank activity, filtered through its own liquidity relationships and business model. This is also why comparing a specific price quote between two brokers as "proof" one is manipulating prices is usually a misreading of normal market structure rather than evidence of anything wrong.
The three trading sessions that create the 24-hour market
Forex trading follows financial centres around the globe as the trading day moves from region to region. The three major, overlapping sessions are commonly referred to by their key financial centres:
- Tokyo (Asian) session — the first major session to open after the weekend, covering Asian and Australasian trading hours. Generally lower volatility than the London or New York sessions for most major pairs, though Asian-currency pairs (like USD/JPY) tend to see their most active local trading here.
- London (European) session — historically the largest session by trading volume, since London remains a major global financial centre. Volatility and liquidity typically pick up noticeably as this session opens.
- New York (American) session — overlaps with the tail end of the London session for a few hours, a window many traders consider the most active and liquid period of the entire trading day, since two major financial centres are simultaneously active.
As one session's regional trading hours wind down, another is just beginning elsewhere in the world — which is precisely why the market runs continuously from Monday morning in Asia through Friday evening in New York, with no true close in between (though individual brokers may have brief technical rollover windows). This continuous handoff between regions is the entire reason forex is often described as a 24-hour market, rather than needing any special technology or exception to normal market rules.
What this means for a trader in India
Converted to Indian Standard Time, the London–New York overlap generally falls in the evening — a practical window for many Indian traders who work standard daytime hours and can dedicate focused attention to the market after their workday. The early Tokyo session hours, by contrast, often fall in the very early Indian morning or late night depending on the specific time of year and daylight-saving shifts in other regions, which some traders find less practical to actively watch, even though currency pairs involving the yen or Australian dollar can see meaningful activity during that window specifically.
None of this means you must trade during the busiest hours — some traders deliberately prefer the calmer, more predictable price action of quieter periods, especially early in their learning, over the sharper, faster moves of the most active overlap window. Matching session timing to your own schedule, temperament, and the specific pairs you trade matters more than chasing "the most active hours" as a rule that applies to everyone equally.
How prices are actually formed: supply, demand, and market makers
At the most basic level, currency prices move based on supply and demand — more buyers than sellers at a given price pushes the price up; more sellers than buyers pushes it down. But unlike a simple auction, forex pricing involves layers of participants: interbank market makers continuously quoting buy and sell prices to each other and to clients, algorithmic trading systems reacting to price changes in milliseconds, and retail brokers aggregating liquidity from multiple sources to offer you a single, executable price. The price you see on your trading platform is the end result of this whole layered process, updated continuously as conditions change throughout the trading day.
What actually moves currency prices
Currency values shift in response to a wide range of factors, and understanding the major categories helps make sense of why price moves when it does, rather than treating movement as random noise:
- Interest rate decisions — a central bank raising rates often strengthens its currency, since higher rates tend to attract yield-seeking foreign capital; a rate cut often has the opposite effect.
- Inflation data — persistently high inflation can pressure a central bank toward rate hikes, indirectly affecting currency value through that expected policy response.
- Economic growth indicators — GDP figures, employment data, and manufacturing indices all feed into the broader picture of an economy's health, which influences investor confidence in its currency.
- Trade balances — a country that exports significantly more than it imports tends to see sustained demand for its currency from foreign buyers needing to pay for those exports, though the relationship is more nuanced in practice than a simple rule.
- Geopolitical events — elections, conflicts, and major policy announcements can shift currency values quickly, often reflecting changes in perceived economic or political stability.
- Central bank intervention — some central banks occasionally intervene directly in currency markets to influence their currency's value, particularly when they judge it to have moved too far too fast for their economy's comfort.
No single factor operates in isolation — real price movement usually reflects some combination of these forces, which is part of why fundamental analysis is genuinely difficult to do well, and why even professional economists frequently disagree about near-term currency direction. A beginner-friendly way to hold this: treat the economic calendar as a heads-up for when volatility is more likely, rather than expecting to reliably predict the exact direction a given release will push price — even correctly anticipating a data point's outcome doesn't guarantee correctly anticipating how the market will react to it.
Liquidity and volatility change throughout the day and week
Trading volume and price behaviour aren't constant throughout the 24-hour cycle. Liquidity tends to be thinner during the transition between the New York close and the Tokyo open (often called the "dead zone" by some traders), when major financial centres are between active sessions, and it tends to build through the Tokyo session, pick up further as London opens, and peak during the London-New York overlap. Volatility follows a related but distinct pattern — it's not simply "higher liquidity means higher volatility," since a quiet, liquid market can move very little, while a lower-liquidity moment combined with unexpected news can produce outsized moves precisely because there isn't enough depth in the market to absorb a large order smoothly.
Where retail traders actually fit into this picture
It's worth being honest about scale here, because it shapes how you should think about your own trading. The vast majority of daily forex trading volume comes from interbank activity, large institutions, and corporate hedging — retail traders (individuals trading through a broker) represent a comparatively small slice of total market activity, even though that slice has grown substantially with the rise of accessible online trading platforms. This isn't a discouraging fact — it simply means your individual trades don't move the broader market, which in turn means you're free to focus entirely on your own process and risk management without needing to think about "market impact" the way a large institutional trader might. You're a price-taker in this market, not a price-setter, and that's a normal, expected position for a retail participant — your results depend entirely on the quality of your own decisions and discipline, not on whether you can somehow outmanoeuvre the wider market's overall direction.
Algorithmic trading and its effect on price behaviour
A significant share of forex trading volume today comes from algorithmic and automated systems — from large institutional strategies executing enormous orders in carefully managed pieces, to smaller automated retail strategies (expert advisors) reacting to price conditions in milliseconds. This matters for a beginner mainly in one practical sense: some short-term price movements you observe, particularly sharp, brief spikes that reverse quickly, may reflect algorithmic activity reacting to a specific price level or news trigger rather than a considered human decision. Understanding that not every price movement reflects deliberate, sustained conviction from human traders is a useful piece of context when interpreting short-term chart behaviour, especially for beginners still building intuition for what "normal" price action looks like.
Central banks: more than just interest rate decisions
Beyond setting interest rates, central banks influence currency markets in a few other ways worth understanding. Many hold substantial foreign currency reserves, and decisions about how those reserves are managed and allocated can itself influence currency demand over time. Some central banks also engage in direct market intervention — buying or selling their own currency in the open market — when they judge its value has moved further or faster than they're comfortable with, particularly for smaller or more volatile currencies. These interventions are typically less frequent and less predictable than scheduled rate decisions, which is part of why some currencies carry a reputation for occasional sharp, seemingly discontinuous moves that don't map neatly onto any scheduled economic calendar event.
How this compares to stock market structure
If you've traded stocks before, several structural differences are worth understanding explicitly, since assuming forex behaves like a stock exchange leads to genuine confusion. Stock exchanges have a single official closing price and fixed trading hours; forex has neither, in the sense described above. Stock prices reflect a specific company's performance and outlook; currency prices reflect the relative strength of two entire economies against each other, driven by macroeconomic rather than company-specific factors. Stock markets have circuit breakers and centralised regulatory halts in extreme conditions; forex, being decentralised and global, doesn't have an equivalent single-point mechanism, though individual brokers may impose their own risk controls during extreme volatility. None of these differences make forex inherently riskier or safer than stock trading — they're simply different structures that call for a somewhat different mental model.
Weekend gaps and market closures
Although forex runs continuously Monday through Friday, it does close over the weekend (roughly Friday evening to Sunday evening in most time zones, depending on your broker's specific schedule) — no new trading activity, but the underlying economic and geopolitical world doesn't pause with it. This is why prices can occasionally "gap" between Friday's close and Sunday's reopening: significant weekend news can cause the market to reopen at a noticeably different price than where it closed, without the gradual price discovery that would normally happen if trading had continued uninterrupted. This is worth being aware of specifically if you hold positions open over a weekend, since a stop-loss set at a specific price doesn't protect you from a gap that jumps straight past it.
Why understanding market structure actually helps your trading
This isn't purely academic background — understanding how the market is structured has practical implications for real trading decisions. It explains why the same pair can behave very differently depending on the time of day you're watching it, why economic calendar events matter enough to plan around, why weekend-held positions carry a specific kind of risk that weekday positions don't, and why comparing prices across two different brokers at the exact same moment can show small, normal discrepancies rather than a sign something is wrong. Beginners who understand this structure tend to make fewer confused, reactive decisions when price behaves unexpectedly, because they have a mental model for why it might be happening rather than experiencing it as arbitrary.
Putting it together: a practical takeaway
You don't need to master every detail of market microstructure to trade forex sensibly, but a few practical habits follow directly from understanding how the market works: check the economic calendar for scheduled high-impact events before opening new positions, be extra cautious around the lower-liquidity session transitions if you're a beginner still building confidence in normal price behaviour, understand that weekend gaps are a real, structural risk rather than a rare fluke, and don't be alarmed by tiny price differences between brokers — they're a normal feature of a decentralised market, not a sign of a problem. From here, our pips, lots and leverage guide and risk management guide build directly on this foundation, and are worth reading next if you haven't already.