The prevalence of augmented reality devices in our daily lives offers increasing opportunities for users to navigate the real world. However, as users move, on-screen targets move unpredictably, and eventually disappear from the screen in mobile navigation scenarios. The changing target movement pattern creates difficulty for users in selecting the targets on time before targets escape from the screen. This study proposes a novel target selecting technique, AttachedShock, for easing target selection tasks on augmented reality devices by crossing a naturally expanding wave pattern that is attached to targets. We evaluated the effectiveness of the proposed technique by conducting comparative studies on measuring the performance of four techniques under various mobile navigation scenarios. The results indicate that the proposed technique assists users in selecting moving targets to improve the error rate substantially, by a minimum of 61.75%, and incurs acceptable distractions to users, compared to other techniques.