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Everything you need to know about prediction markets.

From the basics of how prediction markets work to advanced trading strategies and analytics.

Glossary

100+ prediction market terms defined — from “outcome token” to “Sharpe ratio.”

How Traders Win on Earnings Calls

How prediction market traders profit on quarterly earnings — large trade positioning, signal scores, and track records before the call.

Polymarket Fees Explained: What Every Trader Needs to Know

Polymarket now charges taker fees across most market categories. Here's the current fee formula, category schedule, what a trade actually costs, and how maker rebates offset taker fees.

Kalshi Fees Explained: What Every Trader Needs to Know

Kalshi's standard taker fee schedule runs from $0.01 to $0.02 per contract and peaks near 50¢. On maker-fee markets, the raw maker multiplier is 4x lower. Here’s how the math, rounding, and funding costs work.

How to Track Geopolitical Bets on Prediction Markets

A fresh wallet deposited $32,500 and bought Maduro capture shares a week before U.S. forces moved in. It cashed out over $400,000. Every major geopolitical insider case started with the same pattern. You can set up alerts to catch the next one.

How to Set Up Custom Trade Alerts on 0xinsider

Stop refreshing the terminal. Set up custom alerts for the exact trades you care about (by category, minimum size, and wallet type) and get notified instantly.

How to Read a Polymarket Order Book

A practical guide to reading and interpreting the Polymarket order book — from basic bid-ask mechanics to advanced depth chart patterns used by professional traders.

How to Use the Kelly Criterion for Prediction Markets

The Kelly Criterion tells you exactly how much to bet when you have an edge. Learn the formula, avoid the pitfalls, and apply it to real prediction market trades.

How to Spot Insider Trading on Polymarket

In June 2025, an Israeli military reservist leaked classified strike plans to a friend who bet $150,000 on Polymarket. It was the first criminal prosecution for prediction market insider trading — and far from the last.

How to Build a Prediction Market Portfolio

Stop betting on individual markets and start thinking like a portfolio manager. Learn how to diversify, size positions, and build a prediction market portfolio that compounds.

How to Analyze a Prediction Market Trader's Track Record

A trader with a 100% win rate and $38,133 in profit sounds impressive — until you learn they've only resolved 5 markets. Here's how to separate skill from luck using real data from 10,059 tracked traders.

How to Trade Prediction Markets During Elections

Elections are the biggest events in prediction markets. Learn the strategies, timing patterns, and analytical frameworks that separate winners from the crowd during election season.

How to Use Large Trade Data in Prediction Markets

Large trades move markets and signal information. Learn how to read the 0xinsider Terminal, interpret signal scores, and build a strategy informed by large trader activity.

How to Trade Prediction Markets: A Beginner's Guide

Everything you need to know to start trading prediction markets, from understanding how shares work to using analytics to find an edge.

How Bayesian Confidence Scoring Works: The Math Behind Trader Grades

Why a trader who made 500% on 3 markets might not be as good as you think, and how Bayesian shrinkage separates skill from noise.

How to Follow Trades in Real-Time on Polymarket

A practical guide to following top traders on Polymarket — see their trades the moment they happen, get notified for large moves, and filter out the noise.

Why Prediction Market Odds Can Add Up to More Than 100%

When both sides of a prediction market show 80%+ odds, something looks broken. It is not. Here is the mechanics behind overround, bid-ask spreads, and illiquid markets.

Prediction Market Trader Grades Explained: What S, A, B, C, D, and F Actually Mean

Two traders both show six-figure P&L. One earned it across 300 markets with a 2.0 Sharpe ratio. The other hit big on two bets. Grades separate proven skill from lucky streaks — here's how to read them.

Theory is great. Data is better.

You've got the concepts down. Now see how real traders actually play the game — P&L curves, strategy breakdowns, and the moves they made to get there.

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