Cancelling Streaming Data

Once an active market data request is no longer needed, it can be cancelled via the IBApi::EClient::cancelMktData method. The one argument to cancelMktData is the ticker ID which was specified in original market data request. Cancelling a subscription allows the user to make a subscription to a different contract and remain within the level 1 market data lines allowance.

•             client.cancelMktData(1001);
              client.cancelMktData(1002);
              client.cancelMktData(1003);
              client.cancelMktData(1014);
              client.cancelMktData(1015);
              client.cancelMktData(1016);
              client.cancelMktData(1017);
              client.cancelMktData(1018);
              client.cancelMktData(1019);

•         client.cancelMktData(1001);
          client.cancelMktData(1002);
          client.cancelMktData(1003);
          client.cancelMktData(1014);
          client.cancelMktData(1015);
          client.cancelMktData(1016);
          client.cancelMktData(1017);
          client.cancelMktData(1018);
          client.cancelMktData(1019);

•         client.cancelMktData(1001)
          client.cancelMktData(1002)
          client.cancelMktData(1003)
          client.cancelMktData(1004)
          client.cancelMktData(1005)
          client.cancelMktData(1014)
          client.cancelMktData(1015)
          client.cancelMktData(1016)
          client.cancelMktData(1017)
          client.cancelMktData(1018)
          client.cancelMktData(1019)

•     m_pClient->cancelMktData(1001);
      m_pClient->cancelMktData(1002);
      m_pClient->cancelMktData(1003);
      m_pClient->cancelMktData(1014);
      m_pClient->cancelMktData(1015);
      m_pClient->cancelMktData(1016);
      m_pClient->cancelMktData(1017);
      m_pClient->cancelMktData(1018);
      m_pClient->cancelMktData(1019);
      m_pClient->cancelMktData(1020);

•         self.cancelMktData(1000)
          self.cancelMktData(1001)