If one owns a LLC from which one trades, would you consider that person a Professional vs Non-Professional Trader?
In this scenario the purpose of the LLC is to write-off the expenses that are incurred in order to trade, such as: data-feed services, exchange fees, computers, etc. There are no employees or partners.
When opening a brokerage account or data-feed account, one is often asked if one is a Professional vs Non-Professional Trader? The consequences of your answer will determine your exchange fee rates, which are 4x to 10x greater for a Professional vs a non-Professional .