What Is Edge in Prediction Markets? Finding Your Trading Advantage
Edge is the difference between the true probability of an event and the market's implied probability. Traders with edge consistently profit over time.
Definition
Edge is a trader’s informational or analytical advantage over the market. In prediction markets, you have edge when your estimate of an event’s probability is more accurate than the market price implies.
How Edge Works
The market prices “BTC > $100k today” at $0.55 (55% implied probability). You have a model, or domain knowledge, that says the true probability is 70%. Your edge is 15 percentage points.
Over many trades where you have 15 points of edge, you will be highly profitable — even though individual trades can go either way.
Sources of Edge
- Domain expertise — a political analyst may have better intuitions about election outcomes than the average trader.
- Speed — being first to react to breaking news before the market adjusts.
- Data and models — quantitative models that process more information than other traders.
- Local knowledge — understanding niche markets that most traders ignore.
Edge on Purrdict
Purrdict’s on-chain architecture with sub-second settlement lets you act on your edge faster than on platforms with slower confirmation times. Speed matters when exploiting mispricings.