Watch Dogs - Traced Best Method

Watch Dogs - best method for getting Invaded

Use this method for the Traced Achievement without turning online invasions off/on and losing your reputation points.

This method is simple.
You will need to be far enough into the story to allow you to participate in online game modes.

First you will want to start an online match and finish. Win or Lose, it doesn't matter both will have the same outcome.

Now you will want to wait a few minutes before starting any missions or any other games. This leaves you available to be invaded.

You should be invaded in less than 5 minutes. Wait for a maximum of 10 minutes before restarting by starting a new online match.

I was averaging a 3 minute wait for people to invade.

No matter which game mode you choose to play, you will be invaded at random by other players, both hack and tail. Hackers will be invading more often than those who are tailing so have patience.

You do not have to let the tailing player succeed, you can identify, kill, or let the player escape. You get credit toward the achievement as soon as the player leaves your game.

This achievement is harder to get because you will need other players to contribute towards this, it has nothing to do with your skill.
That being said, this achievement will be harder to get as time goes on because fewer players will be playing and participating in the online game mode. I recommend trying to get this as soon as you can to make sure there is a large enough pool of players available for invading.

Good Luck!