What forex actually is
Forex is the market where one currency is exchanged for another. Every quote you see, like EUR/USD 1.0850, is a ratio between two currencies. One euro buys one dollar and eight and a half cents. If that number rises, the euro is strengthening against the dollar. If it falls, the dollar is strengthening against the euro. There is no such thing as a currency price on its own — you always need something to price it against.
That framing matters because it changes how you read the news. A weak US jobs report doesn't just move the dollar in isolation; it moves the dollar relative to every other currency it is paired with, and each of those currencies has its own story going on at the same time.
Why currencies are traded at all
Most FX trading isn't speculation. It's the plumbing of global commerce. Companies that import and export need to convert one currency into another. Governments and central banks manage reserves. Pension funds and asset managers hedge foreign investments. On top of all that sits a layer of speculative activity — banks, hedge funds and individual traders — that provides liquidity and takes on risk in return for the chance of profit.
Who participates
The market is a network, not a building. At the top are the largest global banks, which quote prices to each other continuously. Beneath them sit smaller banks, brokers, hedge funds, corporations, algorithmic firms and, eventually, retail traders like you. When you click buy on EUR/USD, your broker sources a price from a group of liquidity providers and passes it to you. That decentralised structure is why spreads, execution speed and even quoted prices can differ slightly from one broker to another.
Why exchange rates change
In the short term, prices move because someone is willing to pay a little more, or accept a little less, than a moment ago. In the medium term, the drivers are interest rates, inflation, growth, employment and central bank policy. In the long term, they reflect the underlying health of one economy relative to another. Sentiment — how traders feel about risk — sits on top of all of it and can dominate for hours or days at a time.
You will never know all of these inputs at once. Nobody does. That's why professional traders focus less on predicting the next tick and more on being prepared for a range of plausible outcomes.
Why forex trades 24 hours a day
The trading week rolls around the globe. It opens in Sydney on Monday morning local time and closes in New York on Friday afternoon. As Asia winds down, Europe wakes up. As Europe hands over, New York takes the baton. That means somewhere in the world, a major financial centre is always open during the week — and that continuous handover is why the market runs around the clock.
The three sessions that matter most are Tokyo, London and New York. London and New York overlap for a few hours each afternoon UK time, and that window is where the deepest liquidity and most of the decisive daily moves happen.
Why liquidity matters
Liquidity is simply how many willing buyers and sellers are active at once. When liquidity is deep, spreads are tight, orders fill cleanly, and price moves in a way that reflects real supply and demand. When liquidity is thin — late in the Asian session, around holidays, in the minutes after a shock headline — spreads widen, stops get run, and single orders can move a price further than they should. Trading a thin market with the same size and expectations as a deep one is one of the fastest ways new traders lose money.
Why preparation beats prediction
Because FX is driven by so many inputs, no honest trader will tell you they know what price will do next. What good traders do is prepare. They know which economic events are due, which sessions they will trade, which levels matter, and what they will do if price does A, B or C. Preparation turns a chaotic market into a set of if-then decisions you have already made in advance — which is exactly the job our daily Trading Plan is designed to do for you.
Key takeaways
- Forex is a global, decentralised market of banks, brokers, funds and traders — not a single exchange
- Every quote is a ratio between two currencies; one strengthens as the other weakens
- Sessions matter: London and New York overlap is where most decisive moves happen
- Deep liquidity means clean execution; thin liquidity means slippage and surprises
- Nobody predicts the market reliably — preparation for multiple outcomes is the real edge