Monitor Ghosting Test

In short Ghosting is a faint copy trailing BEHIND a moving object, caused by pixels changing colour too slowly to keep up. Overshoot is the opposite artefact — a bright or dark halo appearing AHEAD of the object — and it is caused by the panel's overdrive being set too aggressively in an attempt to fix the first problem. Recognising which one you have decides the fix: too much trailing means raising the overdrive setting, and haloing means lowering it. Most monitors label it Response Time, Overdrive, TraceFree or AMA depending on the brand, and the middle setting is usually right. Look at it correctly or you will see nothing: track the moving square with your eyes as it travels, rather than staring at a fixed point, because that is how your eye behaves when following action in a game. If the black square smears badly while the white one looks clean, that is the classic VA panel weakness — dark-to-dark transitions are the slowest on VA, which is the trade for its much better contrast.