Particular embodiments receive multiple touch events detected by a touchscreen. Each touch event may be associated with at least one position on a touchscreen, and at least a portion of the touch events may be located along a line. Particular embodiments may determine that the touch events are approaching an edge of the touchscreen, and may determine a first extrapolated position based on the determination that the touch events are approaching the edge of the touchscreen. The first extrapolated position may anticipate that one or more future touch events will turn before reaching the edge of the touchscreen. Particular embodiments may also provide display information based on the touch events and the first extrapolated position.