The dependencies shown in the Increment Overview and Team Planning Boards represent inter-team dependencies:

Dependencies can only be created on the Team Planning Boards via drag and drop. The Increment Overview is a read-only view, that rolls up all of the work planned and dependencies created by each Team on their Team Planning Boards.

Understanding Dependency Health

• A red line indicates the dependant issue is scheduled in a sprint after the dependancy (blocker)
• An orange line indicates the dependant and dependency are scheduled in the same sprint (a risk)
• A green line indicates the dependant issue is scheduled in a sprint before its dependency