Volume Oscillator (VOSC)

Interpretation / Algorithm
Technical Analysis Studies [prophet.net]
Technical Analysis A to Z by Steven B. Achelis [equis.com]
Volume Oscillator by Shaun Taylor [investopedia.com]
Description with math formula [FMLabs.com]

Product Implementation	Function / Formula / Script / Source Code
Genius Trader [geniustrader.org]	PERL Script - GT::Indicators::VOSC [geniustrader.org]