The V-shaped figure shows a sharp movement of the price, then a full retracement of the movement in stride.
The V top often intervenes in an uptrend and announces a trend reversal. However, it can also form in a downtrend.
The V appears regularly following an economic announcement that upsets investors. This is a sign of high volatility.
The theoretical objective of the figure is the distance between the neck line and the lower/upper V which is transferred to the neck line.