Contract size is the standardized quantity of currency units you buy or sell in a Forex trade. The standard size is 100,000 units of the base currency, but brokers offer smaller lots to suit different traders and account sizes.
Common contract sizes include:
- Standard lot: 100,000 units
- Mini lot: 10,000 units
- Micro lot: 1,000 units
- Nano lot: 100 units
Smaller contract sizes let new traders or those with limited capital participate without large initial deposits. For example, with 100:1 leverage, a micro lot (1,000 units) might require only $10 in margin instead of $1,000 with a standard lot.
Contract size directly affects your risk and potential profit. A larger position means bigger account swings—both gains and losses. Overleveraging (using high leverage with large contract sizes) amplifies risk and can wipe out accounts quickly. Always match your contract size to your account size and risk tolerance.
