If you want a change made to an instrument in one window to automatically apply to the same instrument in another, you can create a so-called Linked group.
To gather instruments into a linked group, click on the colored square next to the window name.
After choosing a color, select the same exact color in all the windows that you want to link. That's it — the windows will be combined into one linked group.
The TigerTrade terminal allows linking of levels plotted on the chart. If you enable the Levels option in the linked group in the DOM, then the levels will be displayed in the same DOM.