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The rules for swap calculation

Swap calculation for currency pairs is made in units of base currency of the instrument.

Swap is calculated by the below formula: Swap = – (Contract_Size × (Interest_Rate_Differential + Markup) / 100) / Days_Per_Year Where:
Contract_Size — size of the contract;
Interest_Rate_Differential — difference between interest rates of Central banks of two countries;
Markup — broker's charge (0.25);
Days_Per_Year — number of days in the year (365).

For example, let's calculate current swap for EURUSD.

Rates of Central Banks:
Euro zone = 1.5% (EUR);
USA = 0.25% (USD).

Long position: Long = – (100 000 × (0,25 – 1.5 + 0,25) / 100) / 365 = 2.74 units of base currency of the instrument per 1 lot.

Short position: Short = – (100 000 × (1.5 – 0.25 + 0.25) / 100) / 365 = –4.11 units of base currency of the instrument per 1 lot.

When a long position sized 1 lot is rolled over the next day, the amount 2.74 EUR shall be deposited to your account (swap charged to open position).
When a short position sized 1 lot is rolled over the next day, the amount
– 4.11 EUR shall be charged off your account (swap charged to open position)

The specification of currency pairs represents swap as the number of base currency units for each currency pair, provided that position size is 1 lot.

To calculate swap for specific position, the below formula shall be used: Position_volume × Swap × base_currency_rate_to_currency_of_deposit_ratio
(Lots × Long_or_short_swap × Price)

For example, let's calculate current swap for a long position for EURUSD currency pair, volume is 1.5 lot, currency of deposit is USD. Long_swap = 1.5 × 2.74 × 1.4110 = 5.8 USD

It means that in the moment your long position sized 1.5 lot is rolled over the next day, the amount 5.80 USD will be deposited to your account (swap charged to open position).

Base currency rate to currency of deposit ratio shall be taken in the moment of charging swap. Swap is charged within the interval between 23:59:30 to 23:59:59 at the time of terminal (trading server).

On Wednesday (midnight from Wednesday to Thursday) triple swap is charged because it accounts three days at once: Wednesday, Saturday and Sunday.

Swap calculation for spot metals and CFD Stocks/CFD ETF group is made on a percentage basis.

On web-site of the company swap is represented as annual interest rate.

Formula for its calculation is as follows: (Long_or_short / 100 / 360) × Lots × Price

For example, let's calculate current swap for such instrument as #BMW. Since it is the share of European company, calculation shall be made in Euro providing that 1 lot is equal to 100 shares. Swap rate for item #BMW is annual 5%. (5 / 100 / 360) × 100 × 68.50 × 1.4050 = 1.34$, Where:
100 — volume of position (number of shares);
68.50 — rate of #BMW product by the moment swap is charged;
1.4050 — convert of swap into USD through EURUSD rate by the moment swap is charged.

It means that in the moment your position sized 1 lot of #BMW (100 shares) is rolled over the next day, the amount – 1.34 USD will be charged off your account (swap charged to open position).

Base currency rate to currency of deposit ratio shall be taken in the moment swap is charged.
Swap is charged within the interval between 23:59:30 to 23:59:59 at the time of terminal (trading server).

On Wednesday (midnight from Wednesday to Thursday) triple swap is charged because it accounts three days at once: Wednesday, Saturday and Sunday.