How do I calculate the rollover adjustment? The Rollover adjustment can only be calculated at the time the rollover occurs. You can find more information, including rollover dates and calculation information, on our CFD Rollover page. Related articles What is the minimum trading volume required before I can withdraw my bonus? Where can I see my trading history? How is the usable margin calculated? Where can I see spread sizes? Why should I trade options when I can use leverage in spot trading?