Order types
Three ways to get into a position. Each one trades off speed, price control, and cost differently.
Market
Fills immediately at the best available price. You sacrifice price control for speed. When you want in now and don't want to babysit an order, this is it.
| Speed | Instant |
| Price control | None — you take what's available |
| Hexio fee | 1% |
| Polymarket fee | Yes (taker) |
Limit
You name your price. The order sits in the book until someone takes it or you cancel. All limit orders are GTC (good-till-cancel) — they stay open until filled or manually pulled.
| Speed | When matched |
| Price control | Full — your price or better |
| Hexio fee | 1% |
| Polymarket fee | Depends on fill type |
| Cancellable | Yes, any time before fill |
Auto
The smart default. Auto looks at the current best ask (for buys) or best bid (for sells) and places a GTC limit order at that price. You get the current price without paying Polymarket's taker fee — because technically, it's a limit order.
Think of it as a market order that's disguised as a limit order. Same effective price, lower total fee.
| Speed | Near-instant (GTC at best bid/ask) |
| Price control | Auto — uses current best price |
| Hexio fee | 1% |
| Polymarket fee | None — it's a limit order |
| Cancellable | Yes |
Side-by-side
| Market | Limit | Auto | |
|---|---|---|---|
| Speed | Instant | When filled | Near-instant |
| Price control | None | Full | Auto (best bid/ask) |
| Hexio fee | 1% | 1% | 1% |
| Polymarket fee | Yes | Varies | No |
| Cancel | No | Yes | Yes |
Cancelling orders
Limit and Auto orders can be cancelled any time before they fill. Go to your open orders, hit cancel. Done. Market orders fill instantly — nothing to cancel there.