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I am having problems with lagging data.

With NinjaTrader you can try the following steps and see if it helps:

Step 1 – Clear Your Cache

  1. Shut down NinjaTrader
  2. Open Documents > NinjaTrader 8 > db folder
  3. Delete the sub-folder named “cache”
  4. Restart NinjaTrader

Step 2 – Open in Safe Mode

  1. Hold Ctrl while clicking on NinjaTrader to open it
  2. Verify it’s in safe mode under “Help” dropdown
  3. Close and reopen NinjaTrader normally