Board Thread:Questions and Answers/@comment-24912547-20140507090205/@comment-14600979-20140507220304

You could, but it wouldn't work as well as you think. You could send a MEM file saying what is lost and gained, and have the program read it, but it could be abused and other people could accept the trade or someone could trade with themselves. (For example, giving something cheap for something rare, and scanning their own trade.)