Chart trader not staying on selected instrument when using es overlay on mes

[rickr]

I have ES overlaid on MES . . .I want to watch ES and trade MES . . . I set up the chart trader for MES, then click another tab and when I return to the original tab, the chart trader has changed to ES and I am making trades in ES when I want to trade MES ? ? ? how can I correct this ?

[NinjaTrader_Spencer]

Hello rickr,

Thank you for your post.

It would be expected for Chart Trader to select the primary data series when switching between tabs.

You may set the MES as the primary data series by left-clicking to select the MES bars within the chart and then right click > Set as Primary Series.