Shadow Desk

Paper-shadowing a wallet at chain speed — measuring what copying really costs

Dashboard
connecting…
Target walleti
—
Mirrori
watching
Feedi
—
His-capital paper twin — every trade he makes, at his size, at our prices
Twin P&Li
—
realized + open
Realizedi
—
mirrored actions
Open positionsi
—
cost of open book
Couldn't filli
—
his size exceeded our book depth
Live mirror — our real (or dry-run) trades
Mirror P&Li
—
today —
Open mirror positionsi
—
—
no mirror decisions yet — arm the mirror to start
Live entries measuredi
0
buys + sells mirrored as the other side
Median slippagei
—
our ask − his fill, all clips
Copyable fillsi
—
within 1¢ of his price
Blown fillsi
—
more than 3¢ worse
Detect latencyi
—
fill → seen on chain
Time i Sidei Market His filli Size $i Our aski Slip ¢i
waiting for fills…
Every fill this wallet makes settles on Polygon in the same second — we subscribe to those events directly, so a fill is seen in ~1–2 s instead of the 20–45 s the public API takes. For each live BUY we immediately fetch the order book and record the ask we could have hit. The Slip column is the whole experiment: it is exactly what copying would have cost on that fill, per clip, with zero capital at risk. Greyed rows are pre-launch backfill (no book to measure).