Understanding Pips, Lots & Margin

Three concepts underpin every forex position: the pip (how price moves), the lot (how big your trade is), and margin (how much you must deposit to open it). Once these click, sizing a trade and calculating its risk becomes straightforward arithmetic.

Pips: the unit of price movement

A pip — 'percentage in point' — is the standard increment a currency pair moves. For most pairs it is the fourth decimal place: if EUR/USD moves from 1.1050 to 1.1051, that is one pip. For pairs quoted in yen, the pip is the second decimal place. Brokers also quote fractional pips (a fifth decimal), sometimes called pipettes, for finer pricing.

Lots: the size of your trade

Trade size is measured in lots. A standard lot is 100,000 units of the base currency, a mini lot is 10,000, and a micro lot is 1,000. Lot size determines the value of each pip: on a standard lot of EUR/USD, one pip is worth roughly $10; on a mini lot, about $1; on a micro lot, about $0.10. Smaller lots let you control risk precisely.

Margin: the deposit to open

Margin is the portion of a position's full value that you must set aside to open it, expressed by the leverage ratio. At 1:100 leverage, controlling a $100,000 position requires $1,000 of margin. The rest is effectively borrowed exposure. Margin is not a fee — it is collateral held while the position is open.

Decide how many pips of risk your stop allows, then size the position so that risk equals a small fixed percentage of your account. Margin tells you what you can open; risk tells you what you should.

Putting it together

Suppose you risk 1% of a $10,000 account, or $100, on a trade with a 25-pip stop. At roughly $1 per pip (a mini lot), a 25-pip loss costs $25 — too little. Two and a half mini lots gives about $2.50 per pip, so 25 pips equals your $100 risk. Notice the position size came from the risk, not from how much margin was available.