Spread, Swap, Lot, Pip: The One-Page Forex Lesson With Real Examples

Four concepts — spread, swap, lot, pip — sit under every forex trade. If any is fuzzy, every sizing and risk decision is guesswork. This is the one-page lesson: definitions, formulas, and a worked example for each.

1. Pip — the price increment#

A pip is the standard unit a price moves.

• On most pairs (EUR/USD, GBP/USD, AUD/USD): 1 pip = 0.0001.
• On JPY pairs (USD/JPY, EUR/JPY): 1 pip = 0.01.
• On gold (XAU/USD): brokers usually quote 1 pip = 0.10 (so a $1 move in gold = 10 pips).

A fractional pip (or "pipette") is 1/10 of a pip — shown as the 5th decimal on EUR/USD or the 3rd decimal on USD/JPY.

Pip value — the money per pip

Pip value depends on lot size and the quote currency.

Full depth: What is a pip in forex — pip value calculation.

2. Lot — contract size#

A lot is how many base-currency units you're trading.

On MT4/MT5 you type lots directly: 0.01 = 1 micro lot, 0.10 = 1 mini lot, 1.00 = 1 standard lot.

Why lot sizing matters: a $1,000 account risking 2% ($20) with a 20-pip stop on EUR/USD needs:

Lot = 20 / (20 × 10) = 0.10 → one mini lot.

Flip that to 1.00 lot and one 20-pip loss = $200 = 20% of the account. Same trade, same stop — catastrophic difference.

Full depth: What is a lot in forex — calculation guide · Position size & lot calculator guide.

3. Spread — the entry cost#

Spread = ask price − bid price. It's what you pay the broker on entry, built into the quote.

Example — EUR/USD:

• Bid: 1.08520 · Ask: 1.08525
• Spread = 0.5 pip
• On 1 standard lot: 0.5 pip × $10 = $5 cost the moment you open.

A scalper opening 20 trades per day on a 0.5 pip spread pays $100/day just in spread. A swing trader opening 3 per week pays $15. Spread cost scales with trade frequency, not with trade outcome.

Fixed vs variable spread

• Variable (floating): widens in volatile moments or thin liquidity (Asian session, news). Most STP/ECN accounts.
• Fixed: constant regardless of market — usually wider on average, easier to budget.

Raw spread + commission accounts

On "Zero / Raw / Ultra Low" accounts the quoted spread is near zero but the broker charges a commission (commonly $3–$7 per lot round-turn). Total cost can be lower than a standard account if your average spread was above the commission threshold.

Full depth: What is spread in forex — bid/ask explained · XM low spread accounts.

4. Swap — the overnight cost#

Swap (rollover) is the interest credit or debit for holding a position past 5 p.m. New York time. It reflects the rate differential between the two currencies, minus the broker's markup.

Three things to know:

1. Direction matters. Long a high-rate currency vs a low-rate one: you may receive swap. The reverse: you pay.
2. Wednesday = triple swap. Charged to account for the weekend, when rates still accrue but markets are closed.
3. Not all brokers show the same swap. It depends on each broker's funding cost and markup — compare before you pick.

Worked example — 1 lot EUR/USD, held 5 nights

If your broker charges $−7/night on long EUR/USD: 5 nights = −$35. Add Wednesday triple (extra −$14) = −$49 total. On a small account this destroys a swing trade's edge quickly.

Islamic / swap-free accounts

Swap-free (Sharia-compliant) accounts neutralise overnight interest but typically replace it with a flat administration fee after a grace period (varies by broker). Useful for observant Muslim traders and for swap-heavy exotic pairs.

Full depth: Best swap rates broker comparison · Advantages of swap-free trading on XM · Islamic forex account — swap-free guide.

Tying it together — one end-to-end example#

You have a $500 account, you want to risk 1% ($5) on a EUR/USD long with a 25-pip stop.

1. Lot size: Lot = 5 / (25 × 10) = 0.02 → 2 micro lots.
2. Spread cost at 0.5 pip: 0.5 × ($0.10 × 2) = $0.10 entry cost.
3. Hold 3 nights at −$0.70 swap per 0.01 lot: 3 × $1.40 = $4.20 overnight cost.
4. 1:2 target (50-pip TP): profit if hit = 50 × $0.20 × 2 = $10, net ≈ $10 − $4.20 − $0.10 = $5.70.

Without understanding all four concepts, you'd either oversize (risk-of-ruin) or under-estimate holding cost (swap eats the edge).

Quick self-test (5 questions)#

1. On 0.10 lot EUR/USD, how many dollars is 1 pip? → $1.
2. On XAU/USD, if gold moves from $2,400 to $2,405, how many pips? → 50 pips.
3. On a 0.5-pip spread, 1 lot EUR/USD, what's your entry cost? → $5.
4. Which day typically triples swap? → Wednesday.
5. $200 account, 2% risk, 40-pip stop on EUR/USD — what lot? → 4 / (40 × 10) = 0.01 → 1 micro lot.

If you got 5/5, move on to Forex risk management guide. If not, reread the matching section above.

Sources and references#

• ESMA — Product intervention measures relating to CFDs (cost & risk disclosures): https://www.esma.europa.eu/document/esma-decision-product-intervention-measures-cfds
• Bank for International Settlements — FX turnover & liquidity: https://www.bis.org/statistics/rpfx22.htm
• CFTC — Retail foreign exchange dealer rules (lot / margin conventions): https://www.cftc.gov/IndustryOversight/Intermediaries/RFEDs/index.htm