The button under the mouse arrow in pic 1 could be larger for you (but the icon is similar).
Then click the tab in the top-right.
Select in the left pane.
Click Edit.
Is that what you mean ?
This is for V11.1. Maybe you are used to V10.3 … (there it is very different – in V12 it is different again).
There is no Autotrading in that menu. It is where I showed it. See below – it is not there for me neither. It is not there for anyone …
Maye you can show the bottom of a random chart (which allows trading for you) so we can check for that button to be there ? (the button I showed in my porvious post)