Quote from prt_systems:
Exactly. You are an employee of the firm and trade their capital not yours. Any other "definition" is bullflop: if you contribute your capital to either the trading accounts or training then you are an investor in a business - a partner perhaps in an LLP.
If you are going to be a business owner though partnership you had better make sure that you are getting a good agreement. Few, if any of the agreements I have seen were worth the capital contributions being asked for .....