One thing that I've noticed on here, many folks seem to treat this mythical draft chart as the end-all/be-all final word when it comes to trades.
I think it's more like the sticker price on a vehicle. If it's a standard edition truck among hundreds of similar trucks on the lot--you can negotiate the price down. If it's a special limited edition they can only get 10 of and already have a 50 name waiting list--you pay a premium for it. And some premiums cost more than others. And if you don't like/can't afford the premium, you walk away.
If the Dolphins take Jake Long @1, Rams could be losing Orlando Pace and desperately need a new OT to replace him, but decide Clady, Albert, nor Williams is worth pick #2 $, and know they can still have their choice @ 10--it makes them a lil more open to negotiate a trade.
Same with KC.
I'm not making a prediction here, just stating that $$$ and needs can also dictate whether a team is willing to move around in the draft--or take a veteran player at a position of need for them to make a trade happen.
The trade chart doesn't make the trades, but needs and the feeling of coming out a winner on a deal will make trades.