what are weak longs 
weak longs are investors who hold a long position and are quick to exit that position at the first sign of weakness this type of investor is typically trying to capture the upside potential of a security but without significant loss these investors will quickly close their positions when a trade does not move in their favor understanding weak longsweak longs are often short term traders rather than long term investors because they are unwilling to hold their positions through market fluctuations if a trade does not move in their favor they will quickly close their positions and look elsewhere for opportunities most weak longs are momentum traders who are more interested in a quick profit than investing in undervalued companies until they reach a fair value 