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Orderly supports the following order types:

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Limit

An order to buy or sell at a specified price or better. A limit order is placed on the order book and will only execute at the specified limit price or a more favorable price.

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Market

Executes immediately at the best available prices until the full size is filled. If the order is larger than the entire book, or the matching price exceeds the price limit, the remaining quantity is canceled.

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IOC (Immediate or Cancel)

Fills as much as possible at the specified price, immediately. Any unfilled portion is canceled — it will not remain in the order book.

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FOK (Fill or Kill)

All-or-nothing. If the entire order can be filled at the specified price, it executes in full. Otherwise the entire order is canceled with no partial fill.

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Post Only

Guarantees you are the maker. If the order would match visible quantity immediately upon placement, it is canceled instead. If it matches only hidden quantity, the incoming Post Only order is marked as maker and the resting hidden order is marked as taker.

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Reduce Only

Can only decrease an existing position. It will not open a new position or increase your current one. Useful for closing out a position without risk of accidentally flipping direction.