In this paper, we introduce LayerStroke, a new touch-based selection technique for small targets located in a dense cluster. This technique aims to reduce the cluster density by dividing the targets space into different layers. To select a target, users can first select a layer by drawing a stroke on the screen. After that, targets inside the selected layer can be picked up by tapping the corresponding tiles. Our technique has two advantages. First, targets can be selected easily by using a simple combination of drag and tap gestures. Second, unlike some other acquisition techniques, no magnified view is necessary and the initial view can be used for selection.