Order execution · Fictional book

Polymarket limit order simulator

Explore what fills now and what happens to the remainder. This is an international prediction-order illustration, not a US or perpetuals trading interface.

One book. Different order policies.

Fictional opposite-side depth. Edit all three levels. Fixed share quantity; no orders are sent and no wallet is connected.

If any amount would match immediately, post-only rejects this sample order.

Entered asks

Price in centsAvailable shares

Partial fill with resting remainder (model)

Immediately filled shares
150
Resting shares
50
Canceled shares
0
Rejected shares
0
Modeled purchase cost, before fees
$80.00
Average filled price
53.33¢

Modeled immediate fills

  • 50 shares at 52¢
  • 100 shares at 54¢

Static depth and policy illustration, not a live quote or execution guarantee. It excludes queue priority, matching delays, funds/allowances, market eligibility, tick and minimum-size validation, fees, settlement, GTD timing and later fills. Market-buy API amount conventions may differ from this share-based illustration.

Try the same book with different policies

The default buy requests 200 shares with a 54¢ cap. The fictional book offers 50 at 52¢ and 100 at 54¢, so 150 shares fit the limit for $80 before fees. GTC keeps the remaining 50 open in the model; FAK cancels them; FOK models no fill because the full 200 cannot be filled. Post-only rejects the crossing sample order.

Use it as a learning exercise

Real orders depend on the venue’s current book, account checks and matching rules. Read the Polymarket limit-order guide and official order documentation before treating any simulated result as relevant to an actual order. The slippage calculator explores static depth without this policy layer.