What is a lot in forex?
A lot is the standardised unit of trade size in forex. Three sizes are used in retail forex:
| Lot type | Units | EUR/USD pip value |
|---|---|---|
| Standard lot | 100,000 | ~$10 |
| Mini lot | 10,000 | ~$1 |
| Micro lot | 1,000 | ~$0.10 |
When you place a 0.10 lot order, you are trading 10,000 units of the base currency — a mini lot. The pip value tells you how much your P&L changes per pip movement.
Why lot size matters for beginners
Position sizing is the single most important mechanical decision a new trader makes. Most account blowups happen because of over-sizing — placing position sizes too large relative to account equity.
A common guideline (not a guarantee): risk no more than 1–2% of account equity on a single trade.
On a $1,000 account at 1% risk: your maximum acceptable loss per trade is $10. If your stop-loss is 20 pips, and each pip is worth $X, then:
- Max lots = $10 / (20 pips x pip value per lot)
- At 0.01 lot on EUR/USD: pip value = $0.10. 20 pips = $2 risk. Within $10 limit.
- At 0.10 lot on EUR/USD: pip value = $1. 20 pips = $20 risk. Exceeds $10 limit.
Most retail brokers allow trading in 0.01 lot increments (nano lots on some platforms). Starting with 0.01 lots ($1 per pip) on a $500–$1,000 account is the appropriate starting position size for learning with real money.