Madden NFL 15 's career suite, and the progression system in it, was harshly criticized last year despite the game's overall quality, and so some changes are expected when Madden NFL 16 arrives in Trade in and trade up. They work very well. Zero Coupon Bond Definition. Madden 18 Trading Tips and Cheats. Hahn only Madden 19 Forums Forums Home The 18 calculator I used seems to work as well as it did last year, which is to say it's not perfect but it seems very close.