Head smashing was also present enough in episode 5x09 to give us reason to believe Negan is around. When Noah found his old house, he found his mother with her head smashed in the living room. Very similar to what Negan did to Glenn.
A trade-off is a situation where you make a compromise between two things, or where you exchange all or part of one thing for another. ...the trade-off between inflation and unemployment. American English: trade-off
What it is: The trade balance, also known as the balance of trade (BOT), is the calculation of a country's exports minus its imports. When a country imports more than it exports, the resulting negative number is called a trade deficit. When the opposite is true, a country has a trade surplus.