What is Lot Size?
Lot size is the standard unit of trading volume in forex. One standard lot equals 100,000 units of the base currency. Smaller increments include mini lots (10,000 units), micro lots (1,000 units), and nano lots (100 units, rarely supported). On a standard lot of EUR/USD, each pip move equals approximately $10. Prop firms typically allow flexible lot sizing within position size limits, often capped at 1-2% account risk per trade.
Key takeaways
The standard unit of trading volume in forex.
One standard lot equals 100,000 units of the base currency.
Smaller increments include mini lots (10,000 units), micro lots (1,000 units), and nano lots (100 units, rarely supported).
On a standard lot of EUR/USD, each pip move equals approximately $10.
Lot Size vs. Mini Lot
Two terms that frequently get conflated. Here's how they actually differ.
Lot SizeMarket Mechanics · PRO
Mini LotMarket Mechanics · PRO
The standard unit of trading volume in forex.
10,000 units of base currency in forex.
Frequently asked questions
What is Lot Size?
Lot size is the standard unit of trading volume in forex. One standard lot equals 100,000 units of the base currency. Smaller increments include mini lots (10,000 units), micro lots (1,000 units), and nano lots (100 units, rarely supported).
Why does Lot Size matter for prop firm traders?
Lot Size is one of the building blocks of how markets and trading actually work. Without a clean mental model of it, position sizing, risk calculations, and rule-compliance all break down.
How is Lot Size different from Mini Lot?
Lot Size and Mini Lot are commonly confused. Lot Size: The standard unit of trading volume in forex. Mini Lot, by contrast: 10,000 units of base currency in forex.
What should traders watch out for with Lot Size?
On a standard lot of EUR/USD, each pip move equals approximately $10. Prop firms typically allow flexible lot sizing within position size limits, often capped at 1-2% account risk per trade.