I had the same problem and I just found a solution:
1 - Right click on your "Trading Station" icon and select "Properties" 2 - Go to "Compatibility" tab and click on "Change high DPI settings" 3 - At the end, check the checkbox "Override high DPI scaling behavior" and on the select menu "Scaling performed by" select "System (enhanced)".
Use "System" rather than "System (Enhanced)" if you want to be able to change line styles (dashed, solid, dotted etc) for chart objects. The downside is that text is a little blurry.
I also second a high DPI aware version of the Trading Station.