DislikedSemantics...
You didn't clarify we could count a buyer multiple times, so it made it sound like you meant 1:1 in terms of people...Ignored
"For every buyer there must be a seller so the number always stays constant. There are never more buyers than sellers and vice versa."
Let's take a look at your example:
Large trader wants buy 1,000 lots
10 smaller traders wants to sell 100 lots each
The buyer will transact with each small trader therefore 10 transactions 1:1.
So let's take a look:
"For every buyer there must be a seller"
Transaction 1: LG v. ST
Transaction 2: LG v. ST
repeat 8 more times... Therefore every time the LG bought one small trader sold. 1:1 repeated 10 times.
"There are never more buyers than sellers and vice versa."
The ratio is 1:1 all the way through the process.