Walid Khalil and David Steckler introduced the Volume Zone Oscillator(VZO) in the 2009 IFTA (International Federation of Technical Analysis) Journal and followed up in Technical Analysis of Stocks and Commodities magazine in May 2011.

Input selection

• Algo Selection: Use original algorithm or use the alternate one i have created not available anywhere else.
• Signal Period: Sets how many bars or candles the calculation is based on.
• Line Level: Sets the dotted line levels. The default is 60/-60
  
• Select Mode: I give you the option to change the average method. The original uses exponential.
• Max Boundaries: Allows you to zoom in or out using 0 as the middle.