There might not be a better way to save for retirement than by opening an IRA. Roth and traditional IRAs offer all the advantages of other retirement accounts like 401(K)s, with more freedom to pick the investments you want to own in your portfolio. But where you open an account affects everything, from what you can invest in, and how much you pay in fees and commissions. Let’s take a look at how two popular brokers, TradeStation and E*Trade, compare for IRA accounts.