WPF:StreamBase
StreamBase is one of the players in the Algo application server market - Apama is at the top of the stack from the financial perspective. One nice feature of StreamBase is that the download comes with a number of sample financial applications, together with an Eclipse Studio for designing your applications. Using one of the financial samples as a stream of data, its fairly easy to add a WPF UI to visualise the stream.
I wonder if this is really suitable for algo trading.
From their own documentation:
The StreamBase Processing Engine, processes inbound tuples in real time, using the business logic that you defined and delivering results as they are produced - typically in milliseconds.
As far as I see, algo trading vendors are trying to keep latency BELOW millisecond barrier even on more-or-less high volumes.