sgcWebSockets Coloque em produção um servidor WebSocket, ainda esta tarde.

// uses: sgcWebSocket, sgcWebSocket_Classes,
//       sgcWebSocket_Protocol_sgc_Client

FClient = new TsgcWebSocketClient(this);
FClient->Host = "www.esegece.com";
FClient->Port = 2053;
FClient->TLS  = true;
FClient->OnConnect = ClientConnect;

FProtocol = new TsgcWSPClient_sgc(this);
FProtocol->Client = FClient;
FProtocol->OnMessage = ProtocolMessage;

FClient->Active = true;

void __fastcall TForm1::ClientConnect(TsgcWSConnection *Connection)
{
  FProtocol->Subscribe("orders");
  FProtocol->Broadcast("{\"id\":42,\"status\":\"filled\"}", "orders");
}

void __fastcall TForm1::ProtocolMessage(TsgcWSConnection *Connection,
  const UnicodeString Text)
{
  Memo1->Lines->Add(Text);
}

using esegece.sgcWebSockets;

var client = new TsgcWebSocketClient();
client.Host = "www.esegece.com";
client.Port = 2053;
client.TLS  = true;

var protocol = new TsgcWSPClient_sgc();
protocol.Client = client;
protocol.OnMessage += (conn, text) => Console.WriteLine(text);

client.OnConnect += (conn) =>
{
  protocol.Subscribe("orders");
  protocol.Broadcast("{\"id\":42,\"status\":\"filled\"}", "orders");
};

client.Active = true;