Notes on Order Types:
The Swedish Stock Exchange (SFB) has separate round-lot and odd-lot order books. The odd-lot order book is generally illiquid and is subject to price rules that make it inefficient for general trading. Accordingly, IB only offers access to the main round-lot order book where 99+% of the liquidity and activity is transacted.
The minimum order size for this order book is defined for each stock. The TWS will report an error for orders submitted smaller than the minimum allowed size. Alternatively, traders can find the minimum order size by looking up the stock in the IB Contract Search facility.