There are a few reasons why you may see trades in your account.
1. You deposited money in your account: If you deposited cash, we will invest it by buying securities which will cause trades to be displayed in your account.
2. Rebalancing: portfolios will be rebalanced from time to time for different reasons, including (i) as security prices change over time, we may sell some securities and buy others to bring your portfolio back to your recommended target allocation, (ii) if dividends are paid into your account from securities in your portfolio, we may invest this cash in new securities, or (iii) if we substitute securities in your portfolio.