Prediction Market Best Practices 2026: The Professional Trader Checklist

The difference between consistently profitable prediction market traders and those who break even (or lose) usually comes down to process, not just probability assessment. This checklist covers the essential practices that professional traders use every session.

Before Entering Any Position

• Articulate your edge: Why do you know something other traders don't? Write it down in one sentence before every trade.
• Check the spread: Is the bid-ask spread narrow enough that your edge exceeds transaction costs?
• Assess liquidity: Can you exit the position profitably if you need to? Check order book depth.
• Set your probability independently: Form your estimate before looking at market prices to avoid anchoring bias.
• Calculate position size: Use half-Kelly formula. Maximum 5% of bankroll per position regardless of conviction.

During Position Management

• Update on new information: When catalyst events occur (debate, data release, news), update your probability and decide whether to add, hold, or exit.
• Don't check obsessively: Short-term price fluctuations are noise. Check positions daily, not hourly, for longer-duration markets.
• Pre-define your exit criteria: At what price will you exit if wrong? Set this before entering to avoid emotional decisions.

After Each Market Resolves

• Record everything: Date, market, your probability, market price at entry, outcome, profit/loss
• Score your calibration: Were your 70% confident predictions correct 70% of the time?
• Categorize by market type: Do you outperform on political vs crypto vs sports markets?
• Review your losers honestly: Was this a bad process decision or just bad luck with good process?

Weekly Review Routine

1. Reconcile all positions and P&L
2. Calculate rolling 30-day and 90-day Brier scores
3. Review upcoming calendar events (Fed meetings, elections, major data releases)
4. Identify any systematic biases in your recent trading
5. Rebalance portfolio allocation if needed

FAQ

How often should I review my prediction market performance?

Weekly is optimal for most traders. Daily reviews lead to over-trading; monthly reviews miss opportunities to course-correct.

What software should I use to track prediction market trades?

PolyGram's built-in portfolio tracker is a good start. For detailed analytics, download trade history CSV and analyze in Excel/Google Sheets or Python.

How many markets should I research before entering each week?

Research quality beats quantity. Analyzing 3-5 markets thoroughly is more profitable than skimming 20 markets.