How it works
When the Tracker block notices changing of the value on supplier's site it dispatches event on Processor block with new value, which processes it to make rate prediction. When prediction made Processor calls Router block to send data to all connected clients.
When client connects to server Router block send to him client files. When WebSocket connection between client and server established. Router memorises that connection to send data to client.
When client disconnects, it closes WebSocket.