3. Can we have some illustrations on the mark price methodology?

For illustration purposes, consider the following cases:

Case 1: volume weighted prices from past transaction since last update is 95.5

Next mark price = 95.5

Case 2: current mark price = 10000, no transactions happened since last update and current order book is as below

Next mark price = (1 * 9975 + 5 * 10025)/ (1 + 5) = 10016.67

Case 3: current mark price = 10000, no transactions happened since last update and current order book is one-sided as below

Next mark price = (1*7500 + 10 * 10000)/(1 + 10) ~ 9772.73 (rounded to nearest 2 decimal places)