Forex Basics

What Is Swap in Forex?

Swap — also called rollover or overnight interest — is the interest adjustment credited to or debited from your account when you hold a forex position past the daily cutoff time (typically 5 PM New York time). It is not a fee invented by brokers; it reflects the real interest rate difference between the two currencies in the pair. Understanding swap matters whenever you plan to hold positions for more than one day.

Key Takeaways

  • A swap (or rollover) is the interest paid or earned for holding a trade overnight.
  • Swap direction depends on the interest rate difference between the two currencies.
  • Positive swap means you earn credit; negative swap means you pay a charge.
  • Swap rates vary by broker and pair — always check them before holding positions overnight.

Why Swap Exists

Every forex trade involves borrowing one currency to buy another. When you buy EUR/USD, you are effectively borrowing US dollars (paying USD interest) to buy euros (receiving EUR interest). If the interest rate on the currency you are buying is higher than the one you are selling, you receive the net difference. If it is lower, you pay it.

This mirrors the real interbank market, where dealers earn or pay interest on overnight positions. Your broker passes this differential to your account — sometimes with a small markup.

How Swap Is Calculated

Daily swap = Position value × (Interest rate differential ÷ 365) ÷ 100

Example: 3% net differential (Currency A 5% − Currency B 2%), standard lot ($100,000 position value):

$100,000 × (3 ÷ 365) ÷ 100 = $8.22/day received (if long the higher-yield side)

Forex swap rollover diagram showing interest rate differential calculation and triple swap Wednesday pattern
Left: Interest rate differential (5%−2%=3%) drives the $8.22/day swap on a standard lot. Right: Wednesday triple swap covers the weekend via the T+2 settlement cycle — hold past Wednesday 5 PM New York and you get 3× the normal daily rate Thursday morning.
Swap by lot size — 3% net annual differential
  • Standard lot ($100,000 position): $100,000 × (3÷365)÷100 = +$8.22/day if long higher-yield
  • Mini lot ($10,000 position): +$0.82/day
  • Micro lot ($1,000 position): +$0.08/day
  • Short the same pair: −$8.22/day (you pay instead)

Actual swap values depend on current central bank rates, your broker’s markup, and the exact pair. Rates change when central banks change interest rates. Always check your broker’s current swap rates before holding overnight.

Positive vs Negative Swap

ScenarioDirectionSwap Result
Long the higher-yield currencyBuy Currency A (5%) / sell Currency B (2%)Positive swap — you earn
Long the lower-yield currencyBuy Currency B (2%) / sell Currency A (5%)Negative swap — you pay
Short the higher-yield currencySell Currency A / buy Currency BNegative swap — you pay
Carry tradeSystematically long high-yield / short low-yield pairsEarn positive swap daily

When both long and short swaps for a pair are negative, the broker is charging a markup on both directions. This is common and expected — brokers are intermediaries. Both swaps being negative is normal; the spread between the two directions includes a cost margin.

Triple Swap — Wednesday Rollover

The forex settlement cycle is T+2 (trade date plus 2 business days). When a trade rolls over on Wednesday, it is settling for Friday — which then covers the weekend (Saturday and Sunday), adding two extra days. This is why most brokers apply three times the standard swap on Wednesday nights: one day for Friday settlement plus two days for the weekend.

DayMonTueWed ★ThuFriSat/Sun
Swap applied1×1×3×1×1×0×

Total swap per standard week = 1+1+3+1+1 = 7 daily rate equivalents across 5 swap events. If you hold positions through Wednesday 5 PM New York time, check your terminal Thursday morning — the swap charge or credit will be approximately 3× the normal daily rate.

Where to Find Swap Rates in MT4/MT5

  1. Open Market Watch (View → Market Watch)
  2. Right-click the currency pair → Properties (or Specification)
  3. Scroll to the “Swap long” and “Swap short” fields
  4. Values are typically shown in pips or points per day, or directly in account currency per lot

In your MT4/MT5 Terminal open positions tab, the “Swap” column shows the cumulative swap charged or earned so far on that trade. FXGlory publishes current swap rates for all instruments in the contract specifications section of the website.

Swap Impact on Trading Strategy

Trader TypeSwap RelevanceNotes
Day trader (closes before 5 PM NY)NoneNo overnight holding = no swap
Swing trader (days to weeks)Significant−$0.50/day × 30 days = $15 extra cost on 0.10 lots
Carry traderCore incomeStrategy deliberately earns positive swap — price risk is the main variable
Risk note: Carry trading earns positive swap but is exposed to adverse exchange rate movements. A single adverse price move can eliminate weeks of accumulated swap income in minutes. Never assume swap income compensates for undisciplined position sizing.

Swap-Free (Islamic) Accounts

Islamic finance principles prohibit riba (interest). Swap-free accounts — also called Islamic accounts — do not charge or pay overnight interest. Instead, brokers either:

  • Apply a fixed administration fee after a set number of days (typically 3–5 days)
  • Absorb the cost internally with slightly adjusted spreads

FXGlory offers swap-free trading conditions. If you require a swap-free account, review the specific terms carefully: the fixed fee structure can sometimes be more expensive than standard swap for certain pairs or holding periods.

Frequently Asked Questions

No. If one direction earns positive swap, the opposite direction must pay negative swap — the interest flows one way. However, both long and short can be negative simultaneously when the broker adds a markup to both sides. This is the norm, not an exception.
No. Swap is a credit or debit to your account balance — it does not change the price levels at which your stop-loss or take-profit triggers. It directly affects your account balance and therefore your floating equity.
Three swaps: Friday overnight, Saturday, and Sunday. The triple swap on Wednesday is applied in advance to cover the upcoming weekend for positions that roll over at that point. If you open a trade Wednesday before 5 PM New York and close it Thursday morning, you still receive 3 days of swap. Confirm exact timing with your broker’s rollover documentation.
For intraday traders who close all positions before rollover: spread is the only transaction cost — swap is irrelevant. For overnight holders: both spread and swap matter. For multi-day swing trades, accumulated swap can eventually exceed the initial spread cost in total significance.
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