How to read the Kalshi order book
If you have opened a Kalshi market and seen a wall of numbers, that is the order book, and it is the single most useful thing to understand before you trade. It tells you the real price you will get, not just the headline number.
Here is how to read it.
Bids, asks, and the spread
The order book lists resting orders: bids are the highest prices buyers will pay, asks are the lowest prices sellers will accept. The gap between the best bid and best ask is the spread. A tight spread means a liquid, actively traded market; a wide spread is a warning sign of thin trading.
Depth is what you actually trade against
Each price level shows a quantity, called depth: how many contracts are available there. The best ask might be 65 cents, but if only 100 contracts sit at 65 and you want 500, you will fill the rest at worse prices. The headline price is just the first slice.
Reading liquidity at a glance
A healthy book has lots of contracts stacked at many price levels and a narrow spread. A thin book has small quantities, big gaps between levels, and a wide spread. The thinner the book, the more your own order will move the price against you.
Always check before a big order
Before placing a sizable order, glance at the depth around the current price. It tells you whether you can get filled near the quote or whether your order will walk up the book. This one habit prevents most nasty execution surprises.