The Web Front End provides a UI for users to select an account, view trades and positions, initiate new trades, and to administer the accounts themselves.
For the trade and position blotters, it will need to query the position service, and subscribe to a given account on the trade feed for incremental updates.
For executing trades, it will need to query the account service to select an account, the security reference data service to resolve securities, and the trade service for submitting a trade to be executed.
For managing accounts it will need to connect to the account service to query and update accounts, and to the people service for resolving users to associate with accounts.