How to use Price History API in Your .NET Application?

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The article provides general steps on how to use the Price History API.

Details

In order to use the Price History API, you need to perform the following steps:

  • Create the ForexConnect trading session.
  • Before logging in, create an instance of IPriceHistoryCommunicator using PriceHistoryCommunicatorFactory.createCommunicator().

Keep the instance of the price history communicator for as long as the instance of the trading session is in use.

  • Attach the instance of the class that implements the IPriceHistoryCommunicatorListener interface to the communicator using the IPriceHistoryCommunicator.addListener() method.

In that class, implement the following methods. Follow these links for details on the implementation of each method.

  • onRequestCompleted()
  • onRequestFailed()
  • onRequestCancelled()
  • Log in to ForexConnect and wait until the communicator signals that it is ready (IPriceHistoryCommunicator.isReady()). You can also implement the IPriceHistoryCommunicatorStatusListener interface, subscribe it for the status events using the IPriceHistoryCommunicator.addStatusListener() method and then watch for the status changes using this interface.
  • Create an instance of the price history request using IPriceHistoryCommunicator.createRequest().
  • Send the request using IPriceHistoryCommunicator.sendRequest().
  • When the request is completed, the onRequestCompleted() method will be called. In the implementation of this method:
  • Create an instance of the O2GMarketDataSnapshotResponseReader using IPriceHistoryCommunicator.createResponseReader.
  • Use O2GMarketDataSnapshotResponseReader to extract price data from the response object passed to the onRequestCompleted() method.
  • Do not release or dispose of the instance of the price history communicator until:
  • The trading session is logged off.
  • All listeners are unsubscribed.

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