Shut down the NinjaTrader. Reinstall the ATAS platfrom. Then open the folder Documents\NinjaTrader 8\bin\Custom. After ATAS reinstallation two files ADataFeederx86.dll and ADataFeederx64.dll should appear in that folder. If those files are in the folder ADataFeeder indicator should appear in the list of indicators in the Ninja Trader.
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