Beware...Most of the time it is capital you give them. You forfeit anywhere from from 5k to 12k as training fee, enrollment fee to be given a chance to trade the firm's capital. This is a non-refundable fee, it is the firm's capital as soon as you hand it over. You will be ask to pay for more training as soon as you lose a small portion of your upfront fees. That is how you will be trading the firm's capital! This was a scam model first used by Oliver Velez. Now many so called prop firms are using this model to scam aspiring traders with a dream. You give the firm the capital, you pay the commisions, the firms gets a split, What a great deal !! A risk deposit, on the other hand, is yours until you lose it - and the firm can't claim that that you are trading their capital !