It always says I am too far away to join a rally. How do I relocate?

To relocate you need to find a 2x2 plot space to move to. Tap on an empty plot and select the Relocate option. It will then let you select the exact position.

You will need to have a Directed relocate item in your inventory though to do this. You can buy then in the Alliance shop under 'Other' for 200,000 alliance coins. Or in the diamond shop for 2000 diamonds.

It is a good idea to move to the alliance territory as you will gain some buffs for being within the alliance zone.