Set minimum investment in bulking with supporting trades

Securities can have a minimum trade amount or marketplace block size. These are defined per security in an additional security profile tab

If bulked order doesn't fulfil this minimum trade size, supporting orders of the same type as the bulk are created to a supporting portfolio.

Minimum trade amount is only checked for buy orders. Marketplace block size is checked for both buy and sell orders

Fetches account from supporting portfolio based on order currency

Process warns if the created supporting order will reduce supporting portfolio's position to negative

Supporting orders always add to the bulk, and are always between the supporting portfolio and the market (via bulk order).