The track-info behavior is designed to work much as a tool-tip. It reacts only when the mouse is over the chart. Thus you can not start it with code, it will only display if the mouse is on top of the chart. So, unfortunately you can not achieve this programatically.
I have two suggestions for you:
1. You can use a single chart view with two vertical axes - one for the two series from the top chart (in your snapshot) and a second one for the two series from the bottom chart. This way you can keep the track info behavior and show info for all 4 series in the track ball.
2. Do not show the track ball at all. Use the TrackInfoUpdated event to only find out which category the mouse is over. Then show the required information somewhere else, say, on the right of the charts. (this would involve custom C# code and XAML)
Let us know how it goes.
the Telerik team