Combos let you combine positions in several markets into a single contract on Predictions on the Betr app. Because every leg has to resolve your way, a Combo's potential gain relative to its price is larger than any single leg's, and so is its risk: if any leg resolves against you, you lose the full amount you paid.
The concept
Instead of placing separate trades across separate markets, a Combo combines those positions into one contract with between 2 and 10 legs. Every leg has to resolve the way you took it for the Combo to settle at its full value. If even one leg resolves against you, the Combo settles at $0.00 and you lose the full amount you paid. Because all of the legs have to come in together, a Combo in which every leg resolves your way settles at a higher value relative to its price than each trade would on its own.
How Combos are priced
When you build a Combo, a quote for that combination is requested from market makers on Polymarket US, and the price you see is the quote available to you. A quote can expire, or be declined after you accept it, in which case your Combo will not be placed. The price generally reflects how likely it is that every leg resolves your way, including how the legs relate to each other. The less likely it is that every leg resolves your way, the lower the price and the larger your potential gain if it does.
If any leg resolves against you, the Combo settles at $0.00. If a leg can't resolve at all, for example because a game is canceled, the Combo settles as described in its contract terms and the Polymarket US Combos FAQs (https://docs.polymarket.us/faqs/combos-faqs).
Building one
1. Start on an eligible sports market and select Combo.
2. Choose YES or NO on your first market.
3. Keep adding markets as additional legs.
4. Before you commit, check the price and what the Combo would settle at if every leg resolves your way.
5. Set your amount and confirm the trade.
A few things worth knowing
Every leg needs to resolve your way for a Combo to settle at its full value. You can also try to sell a Combo before resolution, but only if a buyer is available at a price you accept, and Combos can be harder to sell than single-market positions. Combos also have their own maximum order size and their own fee schedule. Right now, Combos are available on sports markets covering winner, spread, and total contracts. And if the button to place your Combo is grayed out, that usually just means no one is currently able to fill it. Try trimming a leg, lowering your trade size, or give it a bit of time for a market maker to step in.
If your sale isn't going through
A few things commonly get in the way of selling a Combo. Thin liquidity is the biggest one: if there's no buyer at your price or size, the sale can't complete. Fast-moving prices are another, since a shift mid-order, or too little liquidity near your target price, can trigger guardrails meant to prevent a bad fill. And sometimes the sell button is simply inactive because no one's currently quoting your position. That may change if a buyer or market maker returns, but there is no guarantee that one will.
If you run into this, try selling in smaller chunks since those match more easily, and refresh the page to make sure you're looking at a current price before you submit.
Need help?
Questions about Combos, or something not working the way you'd expect? Reach out through support in the Betr app, or email us at [email protected].
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Predictions on Betr are event contracts listed on Polymarket US (QCX LLC), a CFTC-designated contract market, and cleared through Polymarket Clearing (QC Clearing LLC). Betr provides the app you use to access Polymarket US. Betr is not the exchange or a broker. Trading event contracts involves risk, and you can lose the full amount you pay for a contract, plus fees. Each contract is governed by its contract terms and the Polymarket US Rulebook (https://polymarketexchange.com/files/legal/latest/rulebook