Good day, how could I construct fixed threshold volume bars in Zorro? I tried using the Bar function, but unfortunately it doesn't have the volume parameter. The manual says "use run() and global variables", but I can't make it work. Many thanks for your help!

What’s your definition of a “fixed threshold volume bar”?

It's a bar constructed from either tick or 1 min input data, and which closes (completes) when a certain fixed volume is accumulated. So for example a 10,000 shares/contracts bar would keep accumulating tick/1 min input data and expanding it's high/low/close/volume according to the input bars until volume >= 10,000. At that point, this volume bar closes and a new one starts.