Monday: 1 day overnight interest. Trading on Monday, settlement on Wednesday, holding positions from Monday to Tuesday, and settlement date from Wednesday to Thursday, so you have to pay/collect 1 day interest.

Tuesday: 1 day overnight interest. The holding time is from Tuesday to Wednesday, and the settlement date is from Thursday to Friday, so the interest of 1 day should be paid/collected.

Wednesday: 3 days overnight interest. Hold positions from Wednesday to Thursday, and Friday to next Monday is the settlement date, so you have to pay/charge interest for 3 days.

Thursday: 1 day overnight interest. The position is held from Thursday to Friday, and the settlement date is from next Monday to next Tuesday, so the interest of 1 day should be paid/charged.

Friday: 1 day overnight interest. Hold positions on Friday until next Monday, and the settlement date is Tuesday to Wednesday, and only need to pay/collect 1 day interest.

Note: However, in some securities firms, the overnight interest of some currency pairs is calculated on Thursday for three days.