I'm using local data 
{bindings}

I don't know whether i connected it correctly or not, so does it search on the text or on the local data binding?

I don't know because the Test Studio doesnt give any indication.

so:

it would be nice if things are used they are highlighted and in case things are not they are greyed out in that case.

through the whole application :)

see screenprint for example

(in essence: more intuitive  :) )