Skip to main content
The trade panel sits at the top right of every market page. Orders go to Polymarket’s order book — see Orders for what happens after you submit one.

​
Before you can trade

The panel has three things it can say instead of a form:
  • Sign in to trade this market — you are signed out. Connect and it fills in.
  • Set up your trading wallet — a one-time provisioning step. It can take a minute, and once done you never see it again.
  • This market is not accepting orders — the market is closed, has stopped taking orders, or has no order book. Nothing you can do from here.

​
The four controls

1

Yes or No

The top toggle shows both current prices. It is the same selection the chart and the order book use, so changing it here changes them too.
2

Buy or Sell

Buy opens or adds to a position in the selected outcome. Sell closes it.
3

Market or Limit

Market takes what the book is offering. Limit rests at a price you name.
4

Size

Buys are sized in USDC — how much you want to spend. Sells are sized in shares — how much of your position you want to close. That holds for market and limit orders alike.
Changing outcome, side or order type clears the size box, because the unit it is counted in has just changed.

​
Limit price

A limit order adds a Limit price (¢) box above the size. It arrives prefilled from the book — the best ask when you are buying, the best bid when you are selling — and keeps following the book until you type in it. Prices are whole cents from 1 to 99.

​
Limit buys convert to shares

You type dollars, and a line under the box shows what that buys at your limit price: ≈ 34.48 shares. That share count is the order — the terminal converts before it submits, rounding down to the nearest hundredth of a share, so the order never costs more than the amount you typed. Total cost in the preview is the true figure, which can come out a fraction under what you entered. If the amount is too small to buy even 0.01 shares at that price, the line says so instead and the button stays disabled.

​
Max

When you are selling and hold a position in the selected outcome, a Max link appears above the size box with the number of shares you hold. Clicking it fills the box. It is there for market and limit sells alike. The figure is rounded down to two decimals, matching how order sizes are rounded when the order is placed, so Max is always a size that will go through.

​
The preview

Under the size box:
  • Buying shows Available — your USDC balance.
  • Selling shows Position — the shares you hold in this outcome.
Limit orders with a valid price and size add more. A limit buy shows Total cost — the shares it converted to, times your price — and Payout if Yes (or if No), which is what the position returns if that outcome resolves true: one dollar per share. A limit sell shows Proceeds, price × shares. Market orders show no cost preview, because the price is whatever the book gives you. If a buy is larger than your balance, the panel says so in red before you can submit it.

​
Submitting

The button names what it is about to do — Buy Yes, Sell No. It stays disabled until the order is complete and clears the form’s own floor: a buy of either type has to spend at least a cent, a limit sell has to be worth at least a cent at your price, and a market sell has to be at least 0.01 shares.
That floor is a check in the form, not the real minimum. Polymarket enforces its own minimum order size on top of it, so a very small order can pass this check and still be rejected after it leaves the terminal.
On success the size box clears. A resting limit order appears under My orders on the same page; a market order that filled will not be there — look under My fills, since that tab lists only orders still working.

​
Quick orders

If you have saved presets, they appear at the bottom of the panel as chips under Quick orders, labelled with what they will do:
  • BUY $25 MKT — spend $25 at market
  • SELL 100 MKT — sell 100 shares at market
  • BUY $25 @ 42¢ LIM — rest a limit buy, $25 worth, at 42 cents
  • SELL 100 @ 58¢ LIM — rest a limit sell for 100 shares at 58 cents
Chips follow the same units as the form: buy presets carry a dollar amount, sell presets a share count. A limit buy converts to shares at the preset’s own price when it fires, rounded down, exactly as the form does — hover a chip to see the share count it resolves to. A chip fires immediately on click. It uses the outcome currently selected above — the header says which — and takes nothing from the rest of the form. A preset that cannot produce a valid order does not appear here at all. It is flagged on its row in Presets instead, so a missing chip is explained where you made it rather than being a silent gap in this panel. Manage beside the header opens Presets.

Orders

What happens to an order after you submit it.

Presets

Saving the orders you place often.