Trade Size 

A trader for example in the stocks and futures market who likes to trade in huge quantity
for example Trading 100 YM (worth $16.4m time of writing) / ES Contracts (dow jones index & S&P 500 Futures)

or buying 10000s of Apple Shares on the spot.

And of course for the Forex traders 10 lots+

Example 1:
Experienced Trader: I like to wait for pullbacks to my specific price levels and i'll buy 100 YM Futures contracts minimum (of time writing worth $16.4m in cash)
Another Trader: That's alot of size Steve i couldn't handle that.
Experienced Trader: I like to trade size the markets reward those who Trade Size
Another Trader: Oh really steve?
Experienced Trader: Oh yes i like to trade astronomical size!

Example 2:
Steve Ruffley: The ability trade size is a rare, rare thing you know and I'm not even a big trader you know there's guys
out there they are much bigger than me and I trade size because all I make money that's a simple fact
of the matter it's a necessity for me I don't have the interest of patience straight a ten pounds a point it will not give
me what I want out of life so I trade big because the bigger you trade the more money you make
you know you deal with that in your own way.

Trade Size by Straight As A Pencil March 13, 2021

tradesies 

The act of exchanging one item for another; to swap or barter

Ash: "Dammit, another Pikachu!"
Brock: "What the hell? Another Geodude!"
Ash, Brock: "Tradesies?"

tradesies by Beefy5391 July 16, 2009