^DJIA one minute chart anomalies

[stoner]

Check out the Dow Jones one minute chart below. It says the first bar of this morning's pre-market opened at zero. Yesterday's first bar opened below $5000. Can you explain why I'm seeing these anomalies? My data provider is TD Ameritrade.

[NinjaTrader_PatrickG]

I do not see this same data when I connect to TD Ameritrade on my end:

• https://www.screencast.com/t/BAMyWDy5nD6j

Does this persist if you right-click on your chart and select 'reload all historical data'?

[stoner]

I suspect reloading today's data would change the bar because that's what I did yesterday and the bar changed.

[NinjaTrader_PatrickG]

I suspect that this would be a bad real-time tick if it does not persist after reloading the data.

You can use the tick filter to attempt to prevent these bad ticks from being received in real time:

https://ninjatrader.com/support/helpGuides/nt8/options_marketdata.htm