What Is a Prop Trading and How to Become One of the Funded Trader Prop trading is when you trade using a firm’s money instead of your own. The idea is pretty simple if you make a profit, you get to keep a percentage, and if you lose, the firm takes the hit, not you.To get access to that funding, most firms make you go through a challenge first. It’s ba... 859 Jul 15 at 11:10