A standard lot in forex is a contract to trade 100,000 units of the base currency in a currency pair. For EUR/USD, one standard lot equals 100,000 euros. It is the baseline lot size from which other sizes are calculated.
How it works: In a standard lot, each pip (the smallest price movement) equals approximately $10 for most major currency pairs. This means if EUR/USD moves 10 pips in your direction, you gain $100; 10 pips against you, you lose $100. Brokers allow traders to control a standard lot using leverage, so you do not need to deposit the full $100,000+ required to hold the position outright. Instead, you deposit margin—a small percentage of the contract value.
Practical implications for trading: Standard lots carry high exposure. The larger position size means larger swings in profit and loss. For every pip of movement, a standard lot changes by approximately $10; a mini lot changes by $1; a micro lot changes by $0.10. Standard lots require substantial account capital and higher margin from your broker. They suit experienced traders with capitalized accounts. Beginners typically start with micro lots (1,000 units, $0.10 per pip) or mini lots to limit risk.
Lot size comparison: Nano lots (100 units) are for risk-averse traders; micro lots suit beginners; mini lots suit intermediate traders; standard lots suit well-capitalized traders willing to accept larger swings.
