This category is primarily for Prop Firms, and covers both multiple evaluation accounts and multiple funded accounts. For traders the primary purpose of having multiple accounts is to spread the risk across multiple accounts so that one can trade with a smaller position size in each account and not hit the drawdown as easily. Some traders reserve certain accounts for certain setups to more easily track the difference of profitability in certain setups over time. Almost all prop firms will not allow you to use multiple accounts for hedging purposes, ie., going long in one account and simultaneously short on another account using the same instrument. One last caveat, there is a definite correlation between firms that allow traders to have multiple accounts, and problems with the prop firm itself paying out. This is because it is a huge risk to a prop firm to have users have for example 20 accounts, where most traders will fail them, but only one successful trader can incur enormous payouts through leverage. That is, IF the prop firm pays them. As you can see there is an enormous conflict of interest here.