Swap

What is a Swap in Trading?

A swap (also called overnight financing or rollover) is the small credit or charge applied to your CFDs position when you hold it past the broker’s daily rollover time. It reflects financing costs, interest-rate differences, and broker adjustments.

Depending on the instrument and whether you are long or short, the swap can be positive (you receive) or negative (you pay).

  • Hold a position overnight → your account is debited or credited a swap.
  • For currency CFDs, this adjustment is often called an FX swap or Forex swap. In everyday terms, what is swap in forex trading, or what is swap in forex means the same daily rollover cost/credit for holding a currency pair overnight.
  • Swap values vary by instrument, direction (buy/sell), interest-rate differences, and broker settings. Some platforms apply a “triple” swap once a week to account for weekends.

Swap Example

  • You buy 1 lot of EURUSD.
  • The broker shows: Swap long = –3.20 per night (in your account currency).
  • “Long” just means buying.
  • “–3.20” means you’ll pay 3.20 each night you hold it.

Now let’s see what happens:

  • Hold 1 night → you pay 3.20.
  • Hold 3 nights → 3.20 × 3 = 9.60 total.

So if you kept your EURUSD trade open for three nights, your account would be charged 9.60.

How to Calculate Swap

Different brokers display swap in different formats. Here are the common ones used for swap calculation:

  1. Cash per lot (simplest on many platforms) Swap (cash) = Swap rate per lot (cash) × Lots × Days Example: -3.20 × 1 × 3 = -9.60
  2. Points format Swap (cash) = Swap points × Point value × Lots × Days Note: For EURUSD, 1 lot → point value ≈ 1 (Dollar per 0.00001).
  3. Interest-differential overview (for currency CFDs) This explains swap rate calculation conceptually (your platform does the math for you): Swap (per day) ≈ Notional value × (Interest rate of base − Interest rate of quote ± broker markup) / 365 — then converted to your account currency. This is why swap in forex can be positive or negative.

These formulas cover the common swap calculation formula styles you’ll see across platforms.

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