Good question! Wilder's OBV, in my opinion never has worked very well in my own research. I do not understand how he could have thought that his calculations would be valid. So, I have found it of little value. Williams Accumulation/Distribution formula explained in his book the Secret of Selecting Stocks for Immediate and Substantial Gains is an excellent formula but, there needed to be a way to portray it on a chart to graph it's full effect. That was partially done by Mark Chaiken but, unfortunately he destroyed Williams original formula in the process and so, the results of the Chaiken's A/D line are inaccurate. So, I don't use any of them because no one has it right yet. Larry Williams original formula was [[(H-O)+(C-L)]-[(O-L)+(H-C)]/2*H-L]*Volume for the day. That formula makes perfect sense to me and when I use that formula with some of my own enhancements in OmniTrader or Trade Station, it works just fine but, Stockcharts.com does not use the Williams formula in their A/D Line and it would not be as accurate as the one I use anyway so, I can't really show it to you on any of the charts that I post.
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