What order types are on the OSL Pro Trade?

Sep 4, 2026

1. Market Order

  • An order with no limit price, executed immediately at the best available prevailing price on the opposite side of the order book.

  • If the order cannot be fully filled due to insufficient liquidity, any remaining unfilled quantity will be automatically withdrawn.

2. Limit Order

  • An order to buy or sell a specified quantity at a specified limit price or better.

  • Matches with existing orders first; any remaining unfilled quantity will stay in the order book as a resting order.

3. Post-Only Order

  • A special limit order that guarantees the order will only enter the order book as a Maker order, never executing immediately as a Taker.

4. Fill and Kill (FAK)

  • An order that requires immediate execution at a specified price or better.