Get global leaderboard

Timeframe: 1d, 7d, 30d (default: 7d)

Sort: pnl_usdc, win_rate, wins, losses, buys, sells, avg_hold_time, positions_traded, markets_traded, volume_usdc (default: pnl_usdc)

Sort direction: asc, desc (default: desc)

Results limit (default: 100, max: 200)

Pagination offset