Lot in forex: the short answer
A lot is the unit used to measure the size of a trade. When you open a position in MetaTrader or any other platform, the "Volume" field asks for lots, not money. The lot size tells the broker how many units of the base currency (or ounces of gold, or index contracts) you are buying or selling.
If you have searched "lot size kya hai", the answer is: lot size is how big your trade is. A bigger lot means each price move is worth more money to you, in profit or in loss.
Leveraged forex and CFD trading can lose money fast. The lot size you choose is the main control you have over how fast.
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Units per lot: what the size actually means
A forex quote such as EURUSD has a base currency (the first, EUR) and a quote currency (the second, USD). A lot is counted in units of the base currency. If you need a refresher on reading pairs, see Currency pairs.
The exact number of units in a lot is called the contract size. It is set per instrument in the broker's contract specification:
- Forex pairs: contract size is in units of the base currency.
- Metals such as XAUUSD: contract size is usually in ounces.
- Indices such as US100 or NAS100: contract size is in index units, and it can differ between instruments.
- Crypto CFDs: contract size is in coins or fractions of a coin, set per symbol.
Do not assume that a lot means the same quantity on every symbol. In MetaTrader you can check it by opening the symbol list (Market Watch), right-clicking a symbol and choosing Specification. The "Contract size" line shows the units per lot.
Standard, mini, micro and nano lots
Traders use names for common lot sizes. From largest to smallest:
| Name | Relative size | Who typically uses it |
|---|---|---|
| Standard lot | The full contract size | Larger accounts, professional traders |
| Mini lot | A fraction of a standard lot | Medium accounts |
| Micro lot | A smaller fraction of a standard lot | Small accounts, testing a strategy live |
| Nano lot | The smallest of the named sizes | Very small accounts; usually only on cent-type accounts |
Each step down cuts the trade size, and the money value of each pip, by the same proportion. In the platform you do not type "mini" or "micro". You type a decimal lot volume, and the platform shows the size in lots. The minimum volume and the volume step are listed in the symbol specification and differ between account types.
For a side-by-side table with units, see Lot sizes.
Why lot size, not leverage, drives risk
Many beginners think high leverage is what makes trading dangerous. The direct cause of a large loss is a large position.
- Leverage decides how much margin (the deposit the broker holds for an open trade) is needed to open a given lot size. See What is leverage and What is margin.
- Lot size decides how much money each pip of price movement is worth. See What is a pip.
Take the same trade, same pair, same stop loss, same lot size, opened at low leverage and at high leverage. If price hits the stop, the loss in money is the same in both cases. Leverage only changed how much margin was locked.
Leverage becomes dangerous indirectly: it lets you open a much larger lot than your balance can absorb. A trader who opens the largest position the margin allows can reach a margin call or stop out after a small price move. The protection is to choose the lot size from your risk, not from the margin available.
How lot size turns into profit and loss
The money result of a closed trade is:
Profit or loss = price move in pips × pip value per lot × number of lots
Pip value per lot depends on the contract size and on the quote currency. If your account currency differs from the quote currency, the pip value is converted at the current rate. That is why the same lot size can have a different pip value on different pairs. For worked steps, see Profit and loss.
Costs scale with lot size too. Spread, commission (on accounts that charge it) and overnight swap are all charged per lot. See Commission per lot and Total trading costs.
How to choose a lot size
Experienced traders usually size positions backwards from risk:
- Decide the risk per trade: the share of your balance you accept to lose if the stop loss is hit.
- Find the stop distance: how many pips between entry and your stop loss, based on where the trade idea is proven wrong.
- Find the pip value per lot for that symbol in your account currency.
- Calculate: lot size = (balance × risk per trade) ÷ (stop distance in pips × pip value per lot).
- Round down to the nearest volume step the symbol allows.
The calculator below does these steps. Enter your balance, risk per trade and stop distance, and it shows the position size in lots. Every figure it shows comes from the inputs you enter.
Fill in the empty fields to see the result.
Rounded down to 0.01 lot so the risk never exceeds your limit.
Points experienced traders check:
- Wider stop, smaller lot. If the stop has to be wider, the lot size must fall to keep the same money risk.
- Rounding. If the calculated size is below the minimum volume, the trade carries more risk than planned. Either accept a wider risk on purpose or skip the trade.
- Gaps and slippage. A stop loss is not a guaranteed price. Over weekends and news, price can jump past it. See Slippage and Price gaps.
- Open positions combined. Several trades on correlated pairs act like one larger lot. Add up the risk across them.
- Gold and indices. Contract sizes and pip definitions differ from forex, so always recheck pip value per lot on XAUUSD, US100 and similar symbols. See Pips, points, pipettes.
More calculators are on the Calculators page, and position sizing in context is covered in Risk management.
Practise sizing before using real money
Lot sizing mistakes are common in a first live account. A demo account lets you see how pip value changes with volume without losing money. See First demo trade and Demo vs live. Keep in mind that demo fills can differ from live conditions.
A note for readers in Pakistan
Before trading on any overseas platform, read the official position: per the SBP, the purchase of offshore forex/margin/CFD products by Pakistani residents violates section 4(1) of FERA 1947. Details are on Law and regulators.
Frequent questions
What is a lot in forex in simple words?
A lot is the unit for trade size. It tells the platform how many units of the base currency, or of another instrument, you are trading.
What does lot size mean for my risk?
Lot size sets the money value of each pip. Larger lots make each price move cost or pay more, so the same stop distance means a larger possible loss.
Is leverage or lot size more important?
Lot size decides the loss when the stop is hit. Leverage decides the margin needed. High leverage is risky because it allows oversized lots, not because it changes the pip value.
How many units are in a lot?
It depends on the symbol. Check the contract size in the symbol specification in your platform. Forex, metals, indices and crypto CFDs use different contract sizes.
What is the smallest lot I can trade?
The minimum volume and volume step are set per symbol and per account type. Check the symbol specification in the platform or the current conditions in your broker's personal area.
Does a smaller lot mean I cannot lose much?
A smaller lot reduces the loss per pip, but losses can still add up across many trades, wide stops, gaps or several positions at once. Trading with leverage can still lose your deposit.