Yes we have the following limits depending on account size
$5,000 - Max 2.5 lots
$10,000 - Max 5 lots
$25,000 - Max 10 lots
$50,000 - Max 20 lots
$100,000 - Max 40 lots
$200,000 - Max 60 lots
$300,000 - Max 60 lots
Note: Max lot size difference means you can't open more than the allowed max lot per pair at a time.
Example: On a $100K account with a 40 max lot limit, you can't open more than 40 lots on a single pair (e.g., XAUUSD). But you can trade different pairs at the same time.