Some similarities in trade between ancient and modern period are
1. In both ancient and modern times, trade was conducted because no country could produce everything it required. Hence, countries imported needed items from abroad and exported surplus products from its own territory.
2. In both ancient and modern times, most trade was carried out through the sea route.
Some differences in trade between ancient and modern period are
1. The volume of trade in modern times is much higher than in ancient times.
2. Ships that carry out modern trade are much bigger than ships in ancient times.
3. Most modern trade is in manufactured goods while most trade in ancient times was in agricultural goods.