Fixed and floating rates move the adjustment to different places.
An exchange rate always compares two currencies. Under a fixed or pegged system, an authority promises to keep that price near a stated level and absorbs pressure through intervention or policy. Under a float, the quoted rate can move more freely—but central banks still influence it through interest rates, reserves, communication and, sometimes, direct intervention.
Authorities use reserves, interest rates, controls or a parity change to defend the arrangement. A peg can be adjustable; “fixed” never meant effortless or permanent.
A float does not remove central banks. They still set policy, hold reserves and may intervene. It means there is no permanent promise to keep one exact bilateral price.
Modern forex emerged through several turning points—not one invention date.
Currency exchange is ancient. This timeline starts where the rules behind the current market become especially useful to a trader: the post-war system, its breakdown, the move to screens and the stress events that exposed how liquidity really works.
- 01
- 02The gold window closes
On 15 August, the United States suspends official conversion of dollars into gold. [3]
- 03Major currencies float
The Smithsonian repair does not hold. By March, nearly all major currencies are floating against the dollar. [4]
- 04Electronic matching arrives
Reuters Dealing 2000-2 and EBS bring automatic interdealer matching to the market. [5]
- 05The euro begins
Eleven countries start one monetary policy and the euro replaces national currencies on trading screens. [6]
- 06A global dollar squeeze
Central banks expand swap lines and supply dollar funding as financial-market stress intensifies. [7]
- 07
- 08
Bretton Woods tried to combine stable rates with room to adjust.
Delegates from 44 countries met in Bretton Woods, New Hampshire, in July 1944. The system they designed used fixed but adjustable par values. In practice, most countries maintained a rate against the dollar, while the United States promised official dollar conversion into gold at $35 per fine ounce. The IMF was created to support the rules and international cooperation. [1][2]
Members kept market rates close to declared par values through official action.
A country could seek a parity change when a lasting imbalance made the old one unsuitable.
The dollar sat at the centre, so confidence in US gold convertibility mattered to everyone.
Useful for trade and payments, but the declared price still had to fit economic conditions.
Interest-rate and inflation choices could conflict with defending the currency's parity.
More dollars supported global trade, but more claims on US gold made the conversion promise harder to trust.
The shorthand “every currency was backed by gold” hides the actual chain. The dollar held the direct official gold promise; other currencies commonly maintained parities through the dollar.
Closing the gold window began the transition; it did not finish it.
By the late 1960s, dollar liabilities abroad had grown while confidence in gold convertibility weakened. On 15 August 1971, President Nixon suspended official conversion. Countries then tried new parities and wider bands through the Smithsonian Agreement, but renewed flows and intervention pressure made the repair short-lived.[3][4]
- Convertibility suspended
Foreign official holders can no longer exchange dollars for US gold at the official price.
- Smithsonian repair
New parities and wider trading bands try to keep a fixed-rate system alive.
- Generalised floating
Repeated pressure overwhelms the repair; nearly all major currencies float against the dollar.
The change was a sequence, not a switch flicked once in 1971.
Relative inflation, interest rates, growth expectations and capital flows could show more directly in major exchange rates.
Governments and central banks remained central actors. Some currencies kept pegs or managed floats.
Persistent two-way price risk between major currencies—and a larger need for businesses and investors to hedge it.
Banks connected the flows long before retail traders saw a live chart.
Foreign exchange developed as an over-the-counter market. Banks quoted customers, traded with one another and used brokers to find another side. A company might hedge foreign revenue, a fund might rebalance international assets, and a central bank might manage reserves. There was no need for every order to visit one exchange.
A retail chart is one provider's window into a fragmented market.
Price, size and spread can depend on counterparty, venue and market conditions.
Tick volume, venue volume and BIS turnover are different measures.
Screens made the market faster and clearer without making it centralised.
Early electronic services helped two dealers communicate. Automatic matching was the bigger shift: Reuters launched Dealing 2000-2 in April 1992, and EBS launched its system in September 1993. By the end of that decade, electronic systems had become the main route for many interdealer spot trades. [5]
- 01Phone and voice broker
A dealer calls another dealer or a broker to find price and size.
Relationship-led - 02Screen communication
Reuters dealer systems make bilateral conversations faster—initially a better telephone.
Faster contact - 03Automatic matching
Reuters Dealing 2000-2 and EBS match eligible interdealer orders electronically.
Sharper price discovery - 04Platforms, algorithms and APIs
Customers compare streams; banks internalise flow; software can execute and route orders.
More routes, still fragmented
BIS research estimated electronic brokers handled under 5% of interdealer volume in 1992 and about 60% by 2001. That historical estimate describes one segment, not all FX trading. [5]
More dealers could see an executable market price quickly instead of assembling it from calls.
Multi-dealer platforms let customers compare streams; retail brokers later packaged leveraged access for individuals.
Algorithms could quote, split and route orders, but credit limits and counterparties still determined who could trade.
The euro removed several exchange rates and created a new major currency.
On 1 January 1999, the conversion rates of eleven participating currencies became irrevocably fixed and one monetary policy began. The first full trading day followed on 4 January. German marks, French francs and other participating units disappeared from dealer screens as separate floating currencies, while EUR became a major international pair component. [6]
The euro is introduced legally and becomes the accounting and market currency.
The first full trading day begins after financial systems convert over the long weekend.
Euro banknotes and coins arrive later; the currency already existed in wholesale markets.
This is why a pair is also a map of institutions. EUR/USD compares one currency managed for a multi-country monetary union with the currency issued by the United States. A rate decision on either side changes that relationship.
2008 and 2015 revealed what a calm chart can hide.
Most history lessons list dates and stop there. These two events are more useful when read as execution lessons: one showed how global demand for dollar funding travels through FX swaps; the other showed what can happen when a widely trusted policy level vanishes.
In October 2008, the Bank of England, ECB and SNB announced full-allotment dollar operations while swap-line capacity was expanded. FX is not only directional speculation: swaps and funding are core plumbing. [7]
TRADER'S LESSON · currency demand can reflect funding pressure, not just a chart pattern.The SNB discontinued the minimum rate on 15 January 2015. Bank of England research later found poor dealer liquidity in the first hour and greater fragmentation after the event. [8][9]
TRADER'S LESSON · a stop cannot guarantee the requested fill when prices gap and quotes vanish.Today's forex market is electronic, enormous and still fragmented.
The BIS says spot and most FX derivatives still trade OTC, with dealers as intermediaries. Execution can be direct or brokered, disclosed or anonymous, voice or electronic. The 2025 survey found that 59% of trading was electronic, while voice remained important for some large and bespoke transactions. [10]
Includes spot and several derivatives; the survey month was unusually volatile.
Voice still mattered, especially for large or bespoke trades.
Internalisation keeps much activity away from public view.
The BIS describes spot and most FX derivatives as decentralised, fragmented and OTC. Its turnover figure measures activity, not market value, trader profit or money available to retail accounts. [10][11]
History explains five things a trader deals with every week.
Central banks can change the regime
A policy rate, intervention message or abandoned peg can matter more than the neatest technical setup.
Do: check scheduled decisions and define event rules.Liquidity follows people and institutions
An OTC market becomes more or less active as regional centres open, overlap and close.
Do: test the same setup by session and pair.Spreads are market conditions
A provider streams a tradable bid and ask from its available liquidity—not an abstract universal price.
Do: set a maximum spread before the signal.Regulation follows the product
The wholesale FX market, an exchange-traded future and a retail CFD are not the same legal product.
Do: check the provider, entity and contract you actually use.Risk can jump past the plan
In a gap or liquidity vacuum, the next available price can be far from the stop level.
Do: size for uncertainty, not just the normal spread.Five popular forex-history claims, separated from the record.
- MYTHForex was invented in 1971.
- RECORDCurrency exchange is much older. The 1971 decision suspended the dollar's official gold convertibility and accelerated a regime change.
- MYTHBretton Woods put every currency directly on gold.
- RECORDMember currencies had par values in gold or the dollar; in practice the dollar was the main intervention currency and carried the official gold-conversion promise.
- MYTHAll currencies became freely floating in 1973.
- RECORDThe main currencies moved to generalised floating. Many countries have continued to peg, manage or intervene in their exchange rates.
- MYTHElectronic forex is one global exchange.
- RECORDTechnology connected more participants and venues. Spot and most FX derivatives remain a fragmented OTC network.
- MYTHThe $9.6 trillion daily figure is retail spot trading.
- RECORDThe BIS total covers several instruments and wholesale counterparties during one survey month. It is turnover, not retail deposits or profit.