Lot Sizes and Pip Value Explained: Standard, Mini and Micro Lots

Forex position sizing confuses people for one avoidable reason: the unit of trade and the unit of price movement are different things, and both have nicknames. Lots measure how much currency you control. Pips measure how far price moved. Pip value is the bridge between them, and once you can calculate it the rest of position sizing is ordinary arithmetic.

The four lot sizes

A lot is a fixed quantity of the base currency — the first currency in the pair. Trading one lot of EURUSD means controlling that quantity of euros, priced in dollars.

• Standard lot — 100,000 units of the base currency. Written as 1.00 on most platforms.
• Mini lot — 10,000 units, one tenth of a standard lot. Written as 0.10.
• Micro lot — 1,000 units, one hundredth of a standard lot. Written as 0.01.
• Nano lot — 100 units. Written as 0.001, and offered by only a minority of brokers.

The decimal on your order ticket is a fraction of a standard lot, which is why 0.25 lots means 25,000 units and not 25 of anything. Most retail brokers accept increments of 0.01, so the micro lot is the practical smallest step for the majority of accounts.

What a pip is

A pip is the fourth decimal place for most pairs — 0.0001 — so EURUSD moving from 1.0850 to 1.0851 is one pip. Japanese yen pairs are the standing exception: they quote to two decimals, so a pip on USDJPY is 0.01 and a move from 150.20 to 150.21 is one pip.

Modern platforms quote an extra digit beyond the pip, the pipette or fractional pip, which is where a price like 1.08507 comes from. That trailing digit is one tenth of a pip and exists so brokers can price spreads more precisely. It is not a different unit of measurement, and reading a five-decimal quote as though the last digit were a pip inflates every distance by a factor of ten.

Calculating pip value

Pip value is pip size multiplied by lot size, expressed in the quote currency — the second currency in the pair. For EURUSD that is 0.0001 times 100,000, which equals 10 dollars per pip for a standard lot. Because the quote currency is already the dollar, no conversion is needed, and the same logic covers GBPUSD, AUDUSD and NZDUSD.

• Standard lot on a USD-quoted pair — 10 dollars per pip.
• Mini lot — 1 dollar per pip.
• Micro lot — 10 cents per pip.

Yen pairs need one extra step. On USDJPY a standard lot gives 0.01 times 100,000, which equals 1,000 yen per pip — and yen is not what your account is denominated in. Divide by the current USDJPY rate to convert: at 150.00, that 1,000 yen is 6.67 dollars per pip. The consequence is that pip value on yen pairs drifts as the exchange rate moves, unlike the fixed 10 dollars on EURUSD.

Turning pip value into position size

The formula is short: position size equals risk amount divided by (stop distance in pips times pip value per lot).

Take a 5,000 dollar account risking 1 percent, which is 50 dollars, on a EURUSD trade with a 25-pip stop. Pip value per standard lot is 10 dollars, so the stop costs 250 dollars per standard lot. Fifty divided by 250 is 0.20 lots — two mini lots. If the same setup needed a 60-pip stop, the cost per standard lot rises to 600 dollars and the size falls to 0.08 lots. Same account, same risk, same instrument; the stop distance did all the work.

That relationship is the entire point of sizing off the stop. Wider stops are not riskier than tight ones provided the position shrinks to match, and a trader who keeps size constant while stop distance varies is running a strategy whose risk per trade changes randomly with market conditions.

Gold, indices and the instruments that break the pattern

Spot gold quoted as XAUUSD is usually 100 ounces per lot, so a one-dollar move in gold is 100 dollars per lot — but lot definitions for metals and index CFDs are set by the broker, not by any exchange, and they genuinely differ between firms. The same applies to instruments like US30, NAS100 and GER40, where one broker's standard contract may be several times another's.

There is no way to memorise your way past this. Open the contract specification for the instrument at your own broker, find the contract size and the value of a one-point move, and use that number. Assuming a value that belongs to a different broker is one of the more common causes of a position turning out several times larger than intended.

Leverage does not change your risk

Leverage determines the margin required to open a position, nothing else. A 0.20 lot EURUSD position risks 50 dollars on a 25-pip stop whether the account runs at 30 to 1 or 500 to 1 — the only difference is how much capital is tied up as margin while the trade is open. Higher leverage lets you open larger positions than your balance would otherwise support, which is a reason it is dangerous, but it never alters the loss produced by a given stop at a given size.

The practical rule follows directly: size from the stop and the risk budget, then check that the margin required is comfortably available. Sizing from available margin instead is how accounts end up with a single position whose stop represents a fifth of the balance.