Trading functions using an underlying central limit order book for each market / underlying asset.
Placing Orders
On an insert order instruction, the public key for the underlying market for that particular product, as well as the price, size and side of the order must be passed in.
For more details about specific order types see Order Types.
Tick sizes
Orders can only be placed with a minimum tick size on insert. For orders which are below the minimum increment value, they will be rejected.