Take the trade balance graph with a grain of salt, it's really impossible to objectively valuate a trade. For example, in order to calculate a balance when trading 7th round picks for 6th round picks, you have to give each a value - but that in turn makes it possible to trade a ton of 7th round picks for a 1st round pick and the algorithm will think it's balanced, when obviously anyone would give up their entire future of 7th round picks for the 1.1 pick, and no one would ever give up the 1.1 for 1,000 7th round picks. Add the complexity of different teams having different values for players, and the balance bar really is just there to prevent the outliers from going through.