Trade and exchange

Tradestops, they allow u to trade things in the bag and Pokémon.
U should be able to see all of the people in reach of the tradestop. U can click on someone and offer to trade something like a Snorlax. If the other person doesnt want it, they can deny. If they want it, they can ouch accept, and offer something (like a charazard). If u dont want what they offer, then u can push deny or push accept if u like the deal

John Cordane about Pokémon GO, v1.29.1