If a country is currently producing at a production point such that the trade line has a slope that is flatter than the slope of the PPC at the same point,
then the country cannot improve on its gains from trade.
the country can get greater gains from trade if it moves production toward the good on the vertical axis.
the country can get greater gains from trade if it moves production away from the good on the vertical axis.
There are no gains from trade in this example.