## Comment on Commonly Used Jargons

For every buyer there needs to be a seller and vice-versa, right?

Then how is the volume actually calculated, what it actually signifies?

Suppose I have one chocolate and I sell it to my friend. If we calculate the volume, simply, as sum of sells and buys, it comes comes out to be 2 chocolates. But this doesn’t make sense, because there was only one chocolate which changed hands. And even after the transaction there is only one chocolate.

What am I missing here?