Smart Trading Habits: Fees, Risk and Position Size

What you'll learn in this course

1. 1. Counting fees before you trade

   Kalshi charges a fee when your order fills. The general taker formula is about 0.07 × contracts × price × 1 − price , rounded up. Example 100 contracts at 50¢ → about $1.75 in fees. At 90¢ the same…

2. 2. Finding value with expected value

   Expected value EV compares your estimate with the price. EV per contract = your probability × $1 − price − fees Example You estimate 60%, YES costs 52¢, fee ≈ 2¢. EV ≈ 60¢ − 52¢ − 2¢ = +6¢…

3. 3. Sizing positions

   Even good trades lose sometimes. Position sizing keeps one loss from wrecking your budget. Simple rules - Only use money you can afford to lose. - Cap each trade at a small slice of your budget, for example 1–5%. -…

4. 4. Managing risk and emotions

   Prediction markets move fast around news. A plan helps. Your checklist 1. Read the market rules and resolution source. 2. Know your exit: will you hold to settlement or sell early? 3. Avoid chasing losses with bigger trades. 4. Keep…