When you place a forex trade, you have to choose how big it is. That size is measured in lots. Understanding lots is essential, because the lot you pick decides how much every price move is worth — and therefore how much you can win or lose.
What a lot is
A lot is a standardised bundle of currency units. Instead of buying an odd number like 7,342 euros, you trade in fixed sizes. There are three sizes every beginner should know:
- Standard lot — 100,000 units of the base currency.
- Mini lot — 10,000 units (one-tenth of a standard lot).
- Micro lot — 1,000 units (one-hundredth of a standard lot).
Some brokers also offer even smaller nano lots (100 units). Each step down is one-tenth the size of the one above it.
Why lot size matters: pip value
The lot you choose sets the cash value of each pip. Bigger lot, bigger pip value:
- On a standard lot, one pip is worth roughly $10 (on a USD-quoted pair).
- On a mini lot, one pip is worth about $1.
- On a micro lot, one pip is worth about $0.10.
So the same 20-pip move earns (or costs) about $200 on a standard lot, $20 on a mini, or $2 on a micro. Same market move — very different money, purely because of size.
Note
Lot size is the dial that controls how much each pip is worth. It doesn't change the market — it changes your exposure to it.
Which lot suits a beginner?
Smaller. Almost always smaller than you think.
New traders are usually best starting with micro lots (or nano, if available). At about $0.10 a pip, a mistake costs cents, not hundreds — which lets you learn in live conditions without risking meaningful money. As your account and skill grow, you can step up to mini and then standard lots.
Starting too big is one of the most common beginner mistakes. A standard lot on a small account means a single normal market swing can trigger a margin call.
Risk
Because forex uses leverage, even a micro lot controls far more currency than the cash in your account. Bigger lots magnify both gains and losses fast — never size up just because a trade "feels" certain.
Lots, leverage and risk
Lot size, leverage, and risk are tied together. Leverage lets you control a large lot with a small deposit, but it doesn't reduce your risk — it concentrates it. The safest habit is to let your risk decide your lot, not the other way around:
- Decide how much you'll risk on the trade (many traders cap it at ~1% of the account).
- Set your stop loss in pips.
- Choose the lot size so that pips at risk × pip value equals your risk amount.
That way the lot serves your risk plan instead of overriding it.
How to practise
- Open a demo account and place the same trade in a micro, mini, and standard lot.
- Watch how differently each one's profit and loss moves.
- Practise choosing a lot size after setting your stop and risk.
- Get comfortable with micro lots before ever sizing up — with no real money on the line.
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The bottom line
A lot is your position size: standard (100,000 units), mini (10,000), or micro (1,000). The bigger the lot, the more each pip is worth — and the more you can win or lose. Beginners should start with micro lots and let their risk plan choose the size, never the excitement of a trade.
Educational content only, not financial advice. Trading forex carries a high level of risk. Read our full affiliate disclosure.