You can gain a lot of Silver from trading.
Follow the steps below from the Trade Warehouse to trade.
■ Steps on Trading
1. Check price info at the Trade Warehouse and sail your fleets to a city.
2. Enter the city and buy cheap or recommended trade goods.
3. Sail to another trade city that wants your trade goods at a higher price.
4. Enter the city, check your profit, and sell it!
5. Return to your base to retrieve your trade profit.