The leaderboard is measured using a 30-day TWR (time-weighted return). It is commonly used when comparing benchmarks as it optimizes for calculating the market returns of the assets in each portfolio, versus the timing of deposits and withdrawals.
More explicitly, we measure the portfolio across your stock and ETF holdings. We subtract each day’s end value with the starting value and all net flows, to get a % driven by market movement. Combine the 30 daily returns over 30 days and that creates the 30-day TWR.