You can trade with other players with trading tickets obtained from daily logins. Tap on the player you wish to trade with, tap the ticket icon and wait for the other player to accept. If they initiated the trade, tap the text box that will pop up on the lower left side of your screen. This will open a trading window with a fairness meter where you can add and remove items as you both like. Be informed that both players must press the "Ready" then "OK" button when the trade is deemed fair before it can complete. Players can trade a maximum of eight (8) different item types each or eight (8) stacks of the same item.