This is a flat 2% fee that applies to every buy and sell, regardless of market tier, size, or outcome. It is deducted from the trade amount at the time of execution.
The margin is the difference between the true implied probability and the odds offered to the user. It varies by market tier:
tighter on Tier 2 data-rich markets (3–6%)
wider on Tier 3 data-poor markets (8–15%)
Unlike the trading fee, the margin is not a separate line item; it is reflected in the odds themselves. Total cost to the user is the 2% fee plus the margin embedded in the odds.
