I'm still not really sure what chaining commands means. Can someone be more specific? I think it's a little hard for me to tell what's going on since the game seems sporadic, probably due to the server load.
Sure, when you do orders, they execute in the order that you click them.
So if you very quickly press, square 1 to square 2 to square 3 to square 4, the army starting in square 1 will go to 2, then 3, then 4, picking up all extra units along the way.
I get it now, thanks. When you press WASD you give a command and the selection moves to cell in that direction. So if you jam WWWW.. then you command a bunch of troops to move up at once, all in a line and all occurring in rapid succession.
