ARTICLE SYNOPSIS ...On-balance volume by Tom Aspray On-balance volume or OBV is one of the early technical tools developed by the well-known market analyst, Joe Granville. With the advent of new, and supposedly more sophisticated technical tools, it is used less often. Many analysts feel it is not useful, but I would disagree. I find it a very useful and simple technical tool. While it is much faster and easier to calculate this indicator by computer, it is very easily calculated by hand for individual stocks, market indices or commodities. Here is how you calculate it by hand: 1) Pick an arbitrary starting vol...