Effective Spread Calculator
Understanding transaction costs in prediction markets is critical for profitability. The Effective Spread measures the true cost of trading by comparing your execution price to the mid-market price.
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Latest Guides
Realized Spread vs Effective Spread: Two Similar Metrics, Different Use
Effective spread measures execution cost at trade time. Realized spread measures cost after the market moves. This guide explains both, why they differ, and what each metric tells you in prediction markets.
What to Log for Clean Cost Metrics: Trade Journal Template
If you do not log the right fields, you cannot measure effective spread, slippage, or all in cost correctly. This guide gives a practical logging template for prediction market trading and research.
Fee Math: Per Contract vs Percent Fees and How to Convert
Fees are quoted in different formats. This guide shows how to convert per contract fees and percent fees into comparable units, and how to add fees into all in cost and minimum edge calculations.