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MVIS 0.910

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Dec 26 9:30 AM EST

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To: memoff who wrote (1979)	5/24/2001 8:31:43 AM
From: peter n matzke	Read Replies (2) of 8150

OBV is a running sum of volume. If a given period is up the volume is added to the sum If a given period is down the volume is subtracted from the sum. You already have volume totals for the DJIA, so another column could be added to the spreadsheet adding for up days and subtracting for down days. OBV since it is a running sum can have widely different values depending on start date. For curiosity i just checked a couple data sources which verified this to be true. Also the time period selected for the OBV will provide vastly different results. OBV for 60 min data looks nothing like OBV for daily data

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