Hello there,
I hope everyone are having a great day 
My question is, why is my volume size 1000USD in MT5, and how can I fix it, so I can trade with less money?
Alex
It’s a question for your broker’s support staff, really.
A “full lot” of any forex pair in which the USD is the quote currency is $100,000, a mini-lot is $10,000 and a microlot is $1,000, so it sounds as if you’re talking about 0.01 lot position-sizes (a microlot)?
Might that be the smallest size you can trade, with that broker, Alex? They don’t all accept smaller trade-sizes than that.