Price arbitrage
Net = vs 7d avg on $10k − fees and slippage of 4 orders
Long where the perp is cheaper, short where it is dearer, close when the spread returns to its 7-day average. Net: that move minus taker fees and order-book slippage of the 4 orders at your size. Mark prices; a spread near its 7-day average is not unusual, however wide.
