How to Trade on Polymarket: Place an Order, Sell Early and Cash Out
Learning how to trade on Polymarket is simple once your account is funded. This guide covers the full loop: reading a price, choosing between a market order and a limit order, selling early, claiming winnings and withdrawing your money. Every rule below comes from Polymarket’s own documentation or help center, and we name the source each time. We assume you already have an account. If you do not, start with our beginners guide to Polymarket first.
First, check that Polymarket is available where you live. Several countries can only close existing positions, and the list changes, so our beginners guide covers the region check in detail. Next, make sure your account holds a trading balance. Polymarket’s developer documentation calls that balance pUSD, and press reports describe it as backed one to one by USDC. In practice, you deposit crypto and the app handles the rest. Reports differ on the exact dates of the V2 rollout, so trust what your own balance screen shows.
Step 1: Find a market and read the price
Every market page shows a price for each outcome, and that price works as a probability. According to Polymarket’s documentation, the displayed price is the midpoint between the best bid and the best ask. For example, a bid of $0.34 and an ask of $0.40 display as $0.37, or a 37% implied chance. However, if the gap between bid and ask is wider than $0.10, the platform shows the last traded price instead.
The midpoint is a reference, not the price you pay. Polymarket’s documentation says a market buy fills at the ask, which is $0.40 in that example. A market sell fills at the bid, which is $0.34. That gap is called the spread. A tight spread signals a liquid market, while a wide spread acts as a hidden cost.
Step 2: Choose a market order or a limit order
You can trade in two ways. A market order executes right away against the best resting orders, and the documentation says it never rests on the order book. A limit order lets you name your price. It waits on the book until it fills, expires or you cancel it, and it can fill in part.
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The documentation also describes developer options, such as good-till-cancelled orders, good-till-date orders and post-only orders that only add liquidity. Most traders only need the basic choice above. Order sizes matter too. The documentation’s example order book shows a minimum of 5 shares and a tick size of 0.01. However, both values come from each market’s order book, so check the order ticket.
There is no cap on order size. Polymarket’s help center says the order book has no trading size limits by design. Even so, it warns that a large quantity may not fill without moving the price, so look at the book first.
How to trade on Polymarket in practice: place your first order
- Open a market and pick the outcome you want, Yes or No.
- Choose Buy, then switch between Market and Limit.
- For a market order, enter a dollar amount. For a limit order, enter your price and the number of shares.
- Review the estimate, including any fee, and confirm.
Layouts and labels change from time to time, so follow the wording on your screen. As for fees, our beginners guide explains that takers pay trading fees and makers do not. A limit order that waits on the book is generally a maker order.
Open Polymarket and place a first trade
A worked example with real arithmetic
Imagine you buy 100 Yes shares at $0.40. You pay $40 before any fee. If Yes wins, each share pays $1.00, so you receive $100 and earn $60. If No wins, your shares are worth $0 and you lose the $40. Alternatively, the price may rise to $0.65, and you can sell then. In that case you never wait for the result.
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These figures ignore fees and are an illustration, not a forecast.
How to sell before the market resolves
You do not have to wait for the final result. Polymarket’s help center says you can sell or close a position at any point before the market resolves. You have two options. A market order sells your shares at the prevailing bid. A limit order lets you pick how many shares to sell and at what price. It only executes if a buyer meets that price.
As a rule, a market sell is faster, while a limit sell can earn a better price. Check the bid first, because a thin market can pay much less than the displayed price.
What happens when a market resolves
Most questions resolve through the UMA Optimistic Oracle, according to the documentation. Anyone can propose an outcome by posting a bond, typically $750 in pUSD. A two hour challenge window follows. If nobody disputes the proposal, the market resolves about two hours later. If someone does dispute it, the documentation says resolution takes four to six days.
After resolution, trading stops. Winning shares redeem for $1.00 each and losing shares for $0.00. In a 50/50 outcome, each share redeems for $0.50. Up or down price markets work differently. They resolve from a Chainlink price stream, with no proposal or dispute step.
How to claim your winnings
Winnings do not expire. The documentation states that there is no redemption deadline, so winning shares stay redeemable at any time after resolution. In the app, you claim from your portfolio.
Sometimes a claim fails. According to the help center, the cause is likely a mismatch on your device, and network congestion can also cause delays. The official fixes are listed below.
- Check that your system clock matches your location.
- Turn off any VPN or proxy, and confirm you are in a supported region.
- Wait five to ten minutes, then try again.
- Log out and back in, or switch device or network.
- Contact support through the chat bubble if the problem continues.
How to withdraw your money
The help center describes five steps. Open your portfolio, select Withdraw and enter the recipient address. Then choose the token, amount and network, and confirm with Withdraw again. Funds are sent to that address once the withdrawal is processed.
The developer documentation adds some useful details. Polymarket does not charge a withdrawal fee, although bridge or swap costs can affect what you receive. The app unwraps pUSD into USDC through a Uniswap pool on Polygon, and the interface limits the output difference to under 10 basis points. Because that pool can run low, a large withdrawal may fail. For amounts above $50,000, the documentation suggests splitting the withdrawal or using a third-party bridge. You can also withdraw pUSD directly, but some exchanges do not accept it.
Before you send anything, match the network to the receiving platform. Send a small test amount first, because transfers on the wrong network can be impossible to recover.
Common mistakes to avoid
Most beginners lose money through habits rather than bad predictions. First, they ignore the spread and use market orders in thin markets. Second, they size a trade too large for the book. Third, they treat a 90% price as a sure thing, even though a price can drop quickly on news. Finally, they trade through a VPN, which Polymarket’s help center says can break claims. Never risk money you cannot afford to lose.
Frequently asked questions
Can I sell a Polymarket position before the result? Yes. The help center says you can sell or close a position at any point before the market resolves, using a market order or a limit order.
How long does resolution take? Per the documentation, an undisputed UMA proposal resolves about two hours after it is made. A disputed one takes four to six days.
Is there a deadline to claim winnings? No. The documentation states there is no redemption deadline for winning shares.
Does Polymarket charge to withdraw? The documentation says Polymarket charges no withdrawal fee, but bridge or swap costs can apply.
The bottom line
To summarize how to trade on Polymarket, read the bid and ask, pick a market or limit order, and know your exit before you enter. Then you can sell early, wait for resolution or withdraw with confidence. Take small steps at first, and verify each screen against the official help center.
Sources: Polymarket documentation (prices and order book, order types, resolution, redemption, withdrawals), Polymarket Help Center (selling early, trading limits, claim failed, how to withdraw), and press coverage of Polymarket’s pUSD token, October 2026. This article is information, not financial advice. Prediction markets carry a risk of total loss. Some links on this page are referral links, and we may earn a commission at no cost to you.
