Hi! Sorry for the delayed reply! I hope that by now you already discovered how to fix that situation. Either way, I don't know what happened in there. One way to try to see what is going on is to configure the chart to show the standard volume information (Ctrl+K) and see if something related happens. I hope it helps!

Hello Martin, is it possible for you to update the indicator to the new MT5 Version ? 
(it stopped working since the update).

Thank you :)

Hi, BlackArmor! Yes, of course. If you're talking about the recente 4150 release, there are many messages in the forum about indicators failing to load after updating the terminal to that version; I was understanding it was a version bug, so much so that I just got a new version, 4153, the day after installing the previous one. Could you please check if this indicator still is problematic even in this 4153? I ask that because I tested MW Volume here withoug recompiling in 4153 and it worked fine.

You're welcome, BlackArmor! I'm glad everything is fine now. Have nice trades! =)