It's a waste of money, people don't fall for the advertising of this worthless Blahtech Better Volume indicator, the support doesn't work, they only receive money, but there is no support! The indicator draws in one color or another, draws candles in the last seconds, there is no point in this indicator at all. I do not advise and do not recommend, a waste of money, a terrible indicator!

Your problem is caused by your broker manipulating the tick volumes

Please see this post which explains the issue https://www.mql5.com/en/blogs/post/755678