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What is Forex arbitrage and how to use Forex arbitrage strategy?

arbitrage button

When people talk about trading, they often mean attempting to profit by anticipating the future direction of a market.

But have you ever wondered if there is a way to profit from the Forex market without having to correctly pick the direction of a currency pair?

You might be interested to find out there are a number of market-neutral strategies.

Perhaps the least risky of these is Forex arbitrage.

Before we look at the specifics of arbitrage in Forex, let's first talk about arbitrage in general.

Simply put, arbitrage is a form of trading in which a trader seeks to profit from price discrepancies between extremely similar instruments.

Traders who use this strategy are known as arbitrageurs.

Arbitrageurs look to:

  1. buy in one market; while
  2. simultaneously selling an equivalent size in another interrelated market; to
  3. take advantage of price divergences between the two.

Sometimes in financial markets, products that are effectively the same thing trade in different places or in slightly different forms.

For example, some large companies are listed on more than one stock exchange.

Theoretically, all listings of a certain stock should have parity in their pricing.

After all, we're talking about shares in the same company.

In reality, the flow of information to all parts of the world is not perfectly instantaneous nor do markets trade with complete efficiency.

Therefore, when both stock exchanges are open, it is possible that prices may differ between exchanges.

The first person to notice the price difference could:

...buy the stock on the exchange with the cheaper price...

...while selling on the exchange with the higher price.

Want to know the best part?

By doing so, you can potentially lock in a profit.

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Forex arbitrage explained

So what exactly is Forex arbitrage?

Traders seeking to arbitrage Forex prices are in essence, doing the same thing as described above.

They effectively look to buy a cheaper version of a currency, while simultaneously selling a more expensive version.

Once they subtract their transaction costs, their profit is the remaining difference between the two prices.

A Forex arbitrage system might operate in a number of different ways, but the essence is the same.

Namely, arbitrageurs look to exploit price anomalies.

They might look to exploit price discrepancies between spot rates and currency futures.

A future is an agreement to trade an instrument at a certain date for a fixed price.

Forex broker arbitrage might occur where two brokers are offering different quotes for the same currency pair.

In the retail FX market, prices between brokers are normally uniform.

Therefore, the feasibility of this strategy tends to be limited to the institutional market.

This is also not the only arbitrage Forex trading opportunity to arise in the spot market.

Another type of Forex arbitrage trading involves three different currency pairs.

Forex triangular arbitrage

Forex triangular arbitrage is a method that uses offsetting trades, to profit from price discrepancies in the Forex market.

To understand how to arbitrage FX pairs, we first need to understand the basics of currency pairs.

Let's run through some quick basics.

When you trade a currency pair, you are in effect taking two positions:

  1. buying the first-named currency
  2. selling the second-named currency.

A currency cross is an FX pair that does not include the US dollar.

A theoretical or synthetic value for a cross is implied by the exchange rates of the currencies in question, versus the US dollar.

For example, consider that EUR/USD is trading at 1.1505 and GBP/USD is trading at 1.4548.

We can calculate an implied value for EUR/GBP by dividing one by the other.

1.1505/1.4548 = 0.7908

Why do we divide one by the other?

Simply put, currency pairs can be treated as fractions with numerators and denominators.

Dividing by GBP/USD is the same as multiplying by the inverse.

So EUR/USD x USD/GBP = EUR/GBP x USD/USD = EUR/GBP

If the actual traded value of EUR/GBP diverges from the value implied by the major pairs, an arbitrage FX opportunity exists.

As its name suggests, triangular FX arbitrage consists of three trades.

Let's say that EUR/GBP is actually trading at 0.7911.

arbitrage trade interface

It is higher than our implied value and we want to sell it.

We also need to place two trades in the two related majors, to create a synthetic EUR/GBP opposing position.

This will offset our risk and thereby lock-in profit.

Because the price discrepancy is small, we will need to deal in substantial size to make it worthwhile.

Let's work through the numbers to complete our example for this Forex arbitrage strategy.

If we buy 10 lots of EUR/USD - one lot is 100,000 units of the first-named currency.

When we buy a currency pair, we are buying the first currency and selling the second.

So we are buying 10 lots x 10,000 EUR = 1,000,000 EUR.

As we are dealing at a EUR/USD rate of 1.1505, we are selling 1,000,000 x 1.1505 = 1,150,500 USD.

We simultaneously want to sell an equivalent amount of EUR in EUR/GBP.

So we sell 10 lots of EUR/GBP, which is 1,000,000 EUR.

As we are dealing at a EUR/GBP rate of 0.7911, we are buying 1,000,000 x 0.7911 = 791,100 GBP.

Lastly, we also sell GBP/USD in order to complete the triangle.

This leaves us with no overall exposure to any of the three currency pairs.

To remove our exposure to GBP, we sell the same amount that we bought in the EUR/GBP trade.

So we sell 791,100/100,000 = 7.91 lots of GBP/USD.

We are dealing at a GBP/USD rate of 1.4548, so we are buying 791,100 x 1.4548 = 1,150,892 USD.

Consider the implication:

...if you were physically exchanging currencies at these rates and in these amounts...

...you would have ended up with 1,150,892 USD after initially exchanging 1,150,500 USD into EUR.

So your profit would be: 1,150,892 - 1,150,500 = 392 USD

As you can see, the profit is small relative to the large transaction size.

Also note that we have not taken into account bid/offer spreads nor other transaction costs.

Of course, with a retail FX broker you are not physically exchanging currencies either.

You would have locked in a profit with the trades, but you would still have to unwind your positions.

Keep in mind that daily SWAP adjustments would quickly erode the notional profit you have locked-in.

Forex statistical arbitrage

While not a form of pure arbitrage, statistical arbitrage Forex takes a quantitative approach and seeks price divergences that are statistically likely to correct in the future.

It does so by compiling a basket of over-performing currency pairs and a basket of under-performing currencies.

This basket is created with the goal to short the over-performers and buy the under-performers.

The assumption is that the relative value of one basket to the other is likely to revert to the mean with time.

With this assumption, you want tight historical correlation between the two baskets.

So this is another factor that the arbitrageur must take into account, when compiling the original selections.

You also want to ensure as much market neutrality as possible.

Riskless profit

Arbitrage is sometimes described as riskless...

...but this isn't really true.

A well-implemented Forex arbitrage strategy will be fairly low risk, but implementation is half the battle because execution risk is a significant problem.

You first need your offsetting positions to be executed simultaneously or near-simultaneously.

It gets more difficult because the edge is small with arbitrage - slippage of just a few pips will likely erase your profit.

Other problems with arbitrage in Forex

Problems arise with the volume of people using the strategy.

Arbitrage fundamentally relies on price differentials and those differentials are affected by the actions of arbitrageurs.

Overpriced instruments will be pushed down in price by selling.

Underpriced ones will be pushed up by buying.

Consequently, the price differential between the two will shrink.

Eventually it will disappear or become so small that arbitrage is no longer profitable.

Either way, the arbitrage opportunity will dwindle.

The Forex market's vast number of participants is generally a large benefit...

...but it also means pricing disparities will be rapidly discovered and exploited.

As a result, the quickest player wins in the game of Forex arbitrage.

The fastest price feeds are essential if you want to be the one to profit.

Our Admiral.Prime account offers institutional-grade execution speed:

...which is essential for this type of trading...

...as you will be competing against the fastest in the world.

Seeing as how execution speed can make all the difference, choosing the right arbitrage software can give you a competitive edge.

Feel free to try out new and different strategies before you jump into trading with real money.

free demo account

Also note that the speed of the modern market means you will likely have to use an automated trading system, for successful arbitrage.

After opening an account:

...your best move is...

...to download the feature-rich and award-winning MetaTrader 4 Supreme Edition trading platform.

Simply put, MT4 Supreme offers the ultimate automated trading experience.

Forex arbitrage: final words

All trading systems are subject to the risk that profitability will erode with time.

As new participants chase the same strategy, opportunities dwindle.

Arbitrage is no different.

The fierce competition in the FX market, means you may discover pure arbitrage opportunities are limited.

However, you will likely find the theory useful for exploring related strategies and further trading possibilities.

If you would like to learn about different Forex strategies, you should read about best Forex strategies that work and advanced Forex trading strategies.