See how much margin a sportsbook builds into a two-way market — the vig (juice) and the hold percentage.
The vig (or juice) is the sportsbook's built-in margin. If both sides' implied probabilities add up to more than 100%, the excess is the book's edge.
Overround is how far the implied probabilities exceed 100%. Hold is the share of total balanced stakes the book expects to keep. Lower is better for you.
Sharp books hold ~2–4% on main markets; soft books and props can be 5–8%+. Lower-hold markets give you better prices.