The following video sections shows how to use the DataStream datafeed to use realtime charts from the NinjaTrader plattform. Required indicator / .cs source file to activate the DataStream feature for WTT is attached at the bottom of the article.
Info: To receive intra-bar updates, set the update frequency to a period of seconds (e.g. 1-10 seconds). Info you want closed bars updates only, you can set a long update frequency (e.g. 5 minutes). Closed bars will be updated on the last tick anyhow in realtime, independent from the update frequency setting.