Lots of people seem to like Better Volume indicator, but you have to keep in mind that volume in MT4 is tick volume, which isn't the same as real trading volume.
Yes, there are several MT4 indicators available for volume analysis. Some popular options include the Volume Indicator, Volume Profile, and Money Flow Index (MFI). These indicators can provide insights into volume trends and market activity.
The "Volume Profile" indicator is another common volume indicator that displays volume information at multiple price levels, assisting in spotting support and resistance areas.