Forex Basics

What Is a Lot Size in Forex?

In forex trading, every trade is placed in standardised blocks called lots. The lot size you choose directly controls how much each pip is worth in dollars, how much margin the trade requires, and how much you can gain or lose per price movement. Getting lot sizes right is one of the most practical skills a beginner must have before trading real money.

Key Takeaways

  • A standard lot is 100,000 currency units; mini is 10,000; micro is 1,000.
  • Lot size directly controls how much each pip is worth in dollars.
  • Micro lots let small accounts trade with $0.10 per pip on EUR/USD.
  • Lot size and leverage together determine your total risk exposure per trade.

What Is a Lot in Forex?

A lot is a standardised unit of trade volume. When your platform shows a trade size of “1.00”, that means 1 standard lot — 100,000 units of the base currency.

Currency is traded in large quantities because exchange rate movements are tiny (0.0001 per pip). Without standardised lots, calculating trade size, pip value, and margin would differ at every broker. Lots create a common language for trade sizing across all platforms.

The base currency is the first in the pair. For EUR/USD, 1 lot = 100,000 euros. For GBP/USD, 1 lot = 100,000 pounds sterling.

The Four Lot Sizes

Lot TypeUnitsMT4 VolumeEUR/USD Pip ValueMargin (1:100)
Standard100,0001.00$10.00 / pip$1,100
Mini10,0000.10$1.00 / pip$110
Micro1,0000.01$0.10 / pip$11
Nano1000.001$0.01 / pip$1.10
Lot TypeUnits of Base CurrencyMT4/MT5 Volume LabelWho Uses It
Standard100,0001.00Funded, professional accounts
Mini10,0000.10Intermediate traders, growing accounts
Micro1,0000.01Beginners, small accounts
Nano1000.001Very small accounts, broker-dependent
Each lot type is exactly one-tenth of the one above it. FXGlory minimum: 0.01 lots (micro).

How Lot Size Affects Pip Value

Lot size and pip value are directly proportional. Double the lot size and every pip is worth twice as much — in profit and in loss.

Pip Value (USD) = Trade Size (units) × 0.0001
Applies to USD-quoted pairs: EUR/USD, GBP/USD, AUD/USD, NZD/USD
Lot TypeUnitsPip Value on EUR/USD
Standard100,000$10.00 per pip
Mini10,000$1.00 per pip
Micro1,000$0.10 per pip
Nano100$0.01 per pip
Example — same 50-pip move, different lot sizes

EUR/USD moves 50 pips in your favour. What you earn depends entirely on lot size:

  • Standard lot: 50 × $10.00 = $500
  • Mini lot: 50 × $1.00 = $50
  • Micro lot: 50 × $0.10 = $5
  • Nano lot: 50 × $0.01 = $0.50

The same pip values apply to losses. A 50-pip adverse move on a standard lot costs $500; on a micro lot it costs $5.

For pairs where USD is not the quote currency (USD/JPY, USD/CAD, cross pairs), pip value in USD changes with the exchange rate. See: How to Calculate Pips.

How Lot Size Affects Margin

Margin is the deposit your broker holds while a trade is open. It is calculated from the notional trade value divided by your leverage.

Margin = (Units × Exchange Rate) ÷ Leverage
Lot TypeUnitsNotional Value (EUR/USD 1.10)Margin at 1:100Margin at 1:500
Standard100,000$110,000$1,100$220
Mini10,000$11,000$110$22
Micro1,000$1,100$11$2.20
Nano100$110$1.10$0.22
EUR/USD at 1.10, leverage as shown. Margin changes as the exchange rate moves.
Risk Warning
Lower margin requirements do not reduce trade risk. A standard lot on EUR/USD loses $10 per pip whether held at 1:100 or 1:500 leverage. Leverage only affects how much of your own capital secures the trade — the pip value and potential loss are identical. Trading large lots on high leverage can result in losses that exceed your deposited funds. Always size positions according to risk tolerance, not available margin. See: How Leverage Works.

Choosing the Right Lot Size

Most risk management frameworks recommend risking 1–2% of your account per trade. Use this formula to calculate the correct lot size for any trade:

Lot Size = (Account Balance × Risk %) ÷ (Stop-Loss Pips × Pip Value per Lot)
Example — $500 account, 1% risk, 20-pip stop on EUR/USD
  • Maximum risk: $500 × 1% = $5
  • Pip value per micro lot: $0.10
  • Lot size = $5 ÷ (20 × $0.10) = $5 ÷ $2 = 2.5 micro lots (0.025 → round to 0.02 or 0.03)
Example — $5,000 account, 1% risk, 30-pip stop on EUR/USD
  • Maximum risk: $5,000 × 1% = $50
  • Pip value per mini lot: $1.00
  • Lot size = $50 ÷ (30 × $1.00) = $50 ÷ $30 ≈ 1.67 mini lots (0.17)

Lot size is calculated from account size, risk percentage, and stop-loss distance — not chosen by instinct. See: Forex Trading Examples.

Lot Sizes on MT4 and MT5

On MetaTrader platforms, you set trade volume in the order window. The volume field uses decimal lots:

  • 1.00 = 1 standard lot (100,000 units)
  • 0.10 = 1 mini lot (10,000 units)
  • 0.01 = 1 micro lot (1,000 units)
  • 0.001 = 1 nano lot (100 units) — if your broker supports it

The “Tick value” in MT4’s Market Watch properties shows pip value per lot for each instrument. You can also see margin requirements before confirming any order in the order ticket.

Frequently Asked Questions

Most retail brokers — including FXGlory — accept 0.01 lots (1 micro lot = 1,000 units) as the minimum. Some support 0.001 (nano lots). Check the contract specification for each instrument at your broker.
Yes. Most brokers allow lot sizes in 0.01 increments (and sometimes 0.001), so you can set 0.03, 0.15, 1.40 — any increment needed to match your exact risk amount.
Micro lots (0.01) are the standard starting point for beginners with small accounts. At $0.10 per pip on EUR/USD, a 30-pip adverse move costs only $3 — manageable while you learn. Use a position size calculator rather than picking a number by feel.
No. A bigger lot amplifies both gains and losses equally. Trading lots larger than your account can support relative to your stop-loss increases margin call risk. Correct lot sizing is about matching risk-per-trade to account size — not maximising position size.
If open positions move against you and free margin falls below the broker’s maintenance margin level, a margin call closes positions automatically. Large lots drain free margin faster because each adverse pip costs more. Keeping position sizes appropriate to account equity is the primary protection against margin calls.
Yes. In forex, 1 standard lot = 100,000 units of the base currency, always. For CFDs on indices, commodities, or stocks, the contract size is defined differently. Check the instrument specification — never assume forex lot sizes apply to non-forex CFDs. See: Forex vs CFDs.
What Is a Pip? How pips measure price movement and pip value by lot size How to Calculate Pips Step-by-step pip calculation with worked EUR/USD & JPY examples How Leverage Works Leverage mechanics, margin, and how it amplifies gains and losses How Much Money to Start Forex Minimum capital requirements and lot size considerations Trading Plan Template How to build a forex trading plan with rules and risk limits
Forex Basics Guides
Core Concepts
Costs and Instruments
Leverage and Capital
Market Mechanics
Trading Practice
Comparing Markets

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