How do I add Traded Picks?
You cannot add "Traded Picks" until you have finalized your draft order.
If you see the yellow flag next to Draft Order, that means you have not completed that task, which is first required before entering in keepers.

Once you have Finalized Your Draft Order, then you will be able to access the Traded Picks area.
You can always go back and UNLOCK your draft order, and then re-sort your league draft order if needed.
However, you will not be able to enter keepers until you first finalize the order.