What is Margin in Forex Trading?

TL;DR: Margin is the deposit your broker holds while a trade is open. It is not a fee. Understanding used margin, free margin, and margin level tells you how much room you have left before your broker starts closing positions.**

Margin Is a Deposit, Not a Cost

A lot of newer traders hear the word "margin" and assume it is something they owe or a charge the broker makes. It is neither. Margin is simply a good-faith deposit that your broker sets aside from your account balance to keep a leveraged trade open.

When you open a position, the broker does not lend you money for free and forget about it. They need to know you have skin in the game. So they ring-fence a slice of your account as collateral. That slice is your used margin. It sits there, locked, for as long as the trade is open. Once you close the trade, the margin is released back into your available funds.

Think of it like a security deposit on a rental property. You still own that money. You just cannot spend it while the lease is running.

How the Margin Requirement Is Calculated

Every broker publishes a margin requirement, usually expressed as a percentage. Common figures are 0.5%, 1%, or 2%, though this varies by instrument and jurisdiction.

The formula is straightforward:

Required Margin = Trade Size x Margin Requirement %

A Worked Example

Say you want to buy one standard lot of EUR/USD. One standard lot is 100,000 units. Your broker requires 1% margin.

• Required margin = 100,000 x 1% = $1,000

Your broker locks $1,000 from your account as collateral for that trade. If your account holds $5,000, you still have $4,000 available to use or to absorb losses.

Now say you open a second trade, also one standard lot with a $1,000 margin requirement. Your used margin is now $2,000, and your free margin drops to $3,000.

What Is Free Margin?

Free margin is the money in your account that is not currently tied up as collateral. It does two things:

1. It acts as a buffer against floating losses on your open trades.
2. It determines whether you can open additional positions.

Free Margin = Account Equity - Used Margin

Equity is your balance plus or minus any unrealised profit or loss on open trades. This is the key point: free margin moves constantly while trades are open because equity fluctuates with price.

Continuing the example above: your balance is $5,000, used margin is $2,000, and your trades are currently flat (no profit, no loss). Equity equals $5,000, so free margin equals $3,000.

Now suppose your open positions move against you by $500. Equity drops to $4,500. Free margin drops to $2,500. The used margin stays fixed at $2,000 because that is set by position size, not by price movement.

what is leverage in forex

What Is Margin Level and Why Does It Matter?

Margin level is the ratio of your equity to your used margin, expressed as a percentage.

Margin Level = (Equity / Used Margin) x 100

Using the same numbers: equity $4,500, used margin $2,000.

• Margin level = (4,500 / 2,000) x 100 = 225%

The higher this number, the healthier your account. Most brokers consider anything above 100% to be in safe territory for keeping existing trades open. Problems begin when this number falls toward specific threshold levels.

Why Traders Watch Margin Level

Margin level gives you a single number to gauge account health at a glance. Monitoring it is more useful than watching just your balance, because balance alone does not tell you how much of your money is locked up or how close you are to a forced closure.

What Is a Margin Call?

A margin call happens when your margin level falls to a broker-defined threshold, often set somewhere around 100%, though this varies. At this point, your broker sends you a warning. Historically this was a literal phone call. Today it is typically an automated alert in your trading platform.

The margin call is a warning, not an automatic action. You have options:

• Deposit more funds to raise your equity.
• Close one or more positions to reduce your used margin.
• Do nothing and risk reaching the stop out level.

The margin call is your broker telling you: "Your buffer is running thin. Do something."

What Is a Stop Out?

A stop out is the level below the margin call where your broker stops waiting and starts closing your positions automatically. A common stop out level is 50%, though again this varies by broker.

Here is how the sequence looks in practice:

1. Trades move against you. Equity falls. Margin level drops.
2. Margin level hits the margin call threshold (e.g. 100%). You receive an alert.
3. You take no action. Losses continue.
4. Margin level hits the stop out threshold (e.g. 50%). The broker begins closing your least profitable positions, one at a time, until margin level rises back above the stop out level.

The broker closes positions not to punish you but to protect both parties from an account going negative. In fast-moving markets, even a stop out does not guarantee your balance will not go below zero, though many brokers offer negative balance protection.

how to read a forex broker specification sheet

Does a Higher Margin Requirement Mean Less Risk?

Not exactly, but it does mean less leverage. A 2% margin requirement implies a maximum leverage of 50:1. A 0.5% requirement implies 200:1. Higher leverage means a smaller price move can wipe out your collateral buffer and push you toward a margin call faster.

Retail traders in many regions are subject to regulatory leverage caps precisely because high leverage compresses the distance between opening a trade and getting stopped out. Lower leverage does not make a bad trade profitable, but it gives a trade more room to breathe before the broker intervenes.

This is why your position sizing matters as much as your entry price. A trader who risks a large portion of their account on a single trade at high leverage can receive a margin call within minutes if the market moves sharply.

position sizing for forex traders

People Also Ask: What Happens to My Margin if a Trade Goes in My Favour?

If a trade moves in your favour, your equity rises. Your used margin stays the same because it is fixed by the size of the position you opened. Your free margin increases, and so does your margin level.

In practice this means a profitable position actually makes your account healthier from a margin perspective. You gain more free margin, which you could use to open another position or simply leave as a buffer.

This is also why some traders fall into the trap of over-trading when things are going well. Rising equity generates rising free margin. It can feel like permission to add more positions. But those new positions add to used margin, and if the market reverses, everything unwinds quickly.

FAQ

Q: Is margin the same as leverage? A: No. They are related but different. Margin is the deposit amount required to hold a position. Leverage is the ratio of trade size to that deposit. A 1% margin requirement gives you 100:1 leverage. One is a dollar figure; the other is a ratio.

Q: What is a good margin level to maintain? A: There is no universal answer, but many experienced traders treat anything below 200% as a signal to review open positions. Dropping below 150% with several trades open leaves little room for normal market volatility.

Q: Can I lose more money than I deposited? A: With some brokers and in some market conditions, yes. If a market gaps through your stop out level, positions can close at worse prices than expected and leave a negative balance. Many brokers now offer negative balance protection, which caps your loss at your deposited funds. Check your broker's terms.

Q: Why does my free margin change even when I have not opened a new trade? A: Because free margin is tied to equity, and equity changes with every tick on your open positions. Unrealised losses reduce equity and therefore reduce free margin continuously while a trade is running.

Q: Does the margin requirement change after I open a trade? A: The margin held for an existing position stays fixed at the rate that applied when you opened it. However, brokers can change margin requirements for new positions at any time, particularly ahead of major news events or during periods of high volatility.

The Bottom Line

Margin is not a fee and it is not borrowed money. It is your broker holding a portion of your funds as collateral for an open position. Used margin is what is locked up. Free margin is what is available. Margin level is the ratio that tells you how healthy your account is relative to your exposure.

When margin level falls too far, you get a margin call warning. If it falls further to the stop out level, your broker begins closing positions automatically. The practical takeaway is to keep your position sizes proportional to your account size, monitor your free margin regularly, and treat a margin call as a sign that something has already gone wrong, not a tool for managing risk.