For perpetual swaps, the Mark Price is calculated as the 1-hour Time Weighted Average Price (TWAP) per second of the index price from one hour before the end of transaction support. The formula is:

$\text{Mark Price}(t) = \frac{1 \cdot \text{Index Price}_{(t-3600)} + 2 \cdot \text{Index Price}_{(t-3599)} + \ldots + 3600 \cdot \text{Index Price}_{(t-1)}}{1 + 2 + \ldots + 3600}$

Mark Price(t)=1+2+…+36001⋅Index Price(t−3600)​+2⋅Index Price(t−3599)​+…+3600⋅Index Price(t−1)​​