Is it possible to change lot size in one click trading window via expert advisor or script?

[ak7483]

As title states:)

Regars, AK

[Doerk Hilger]

Yes. As your title says, via EA.

[Ex Ovo Omnia]

Doerk:
Yes. As your title says, via EA.

Could you please give us some clue?

[William Roeder]

I doubt it can be done, but if you're using a EA or script, you don't need the window, they can create their own graphics.