I just realized why volume indicators do not work with Renko or LB in multicharts, it's because with these 2 types, reserved word "Volume" = "Up Vol", and "Dn Vol" gets discarded. Can someone tell me how to reference the true volume of both UP & DOWN bars? Thanks.

I found the solution: Renko Bar has BarType=13 while LB has BarType=10. They both use Ticks instead of Volume. Most Multicharts volume indicators uses Volume for BarType >=2 and Ticks for BarType < 2, so a simple fix to include BarType = 13 And BarType = 10 to use Ticks instead of Volume would do the trick.