 So, when prices are going up, OBV should be going up too, and when prices make a new rally high, then OBV should too.If OBV fails to go past its previous rally high, then this is a negative divergence, suggesting a weak move.The technique, originally called "continuous volume" by Woods and Vignola, was later named "on-balance volume" by Joseph Granville who popularized the technique in his 1963 book "Granville's New Key to Stock Market Profits".