Abstract: This invention concerns a trading platform suitable for derivative and foreign exchange transactions between wholesale banking clients operating in the global financial markets. In particular, the invention concerns an interactive, automated computerized trading platform for regulating the buying and selling of all or part of orders listed on the platform by traders. Using the platform a trader (a broker or dealer) is able to enter an order that includes a (offer or bid) price visible to counterparties as well as one or more better prices that are hidden from counterparties. The trader is also able to interactively respond to visible (bid or offer) prices in counterparties' orders by changing the prices in their own order. And, the platform responds automatically to a counterparty's order that includes a visible price which matches a price, whether visible or hidden, in the trader's order, to facilitate a trade between them.