Model spot and short-perpetual P&L under price and basis changes, supplied funding, holding time and costs. Inspect residual exposure.
Compare depth-adjusted spot spreads, model perpetual funding and inspect trading assumptions. Enable JavaScript to open the complete BTCMox workspace. The calculators work locally; live quotes require access to public provider APIs.
Every tool is provided as a separate HTML page with a stable address. JavaScript adds the interactive workspace; public data is optional.
Test how a spot position and short perpetual respond to a supplied market move and basis change. Enter each leg’s notional, expected scenario moves, funding interval, holding time and costs. The result separates spot P&L, perpetual P&L and modeled funding.
A linear spot-long/perpetual-short scenario can offset a common directional move, but a change in basis introduces residual P&L. Different leg sizes also leave directional exposure. Funding may help or hurt depending on its sign and how it evolves.
This tool evaluates a supplied ending scenario. It does not simulate maintenance-margin tiers, intraperiod liquidation, collateral depegs, forced deleveraging or an exchange outage. A position with a favorable combined ending value could still lose one leg along the way.
Calculation methodology ↗ · Data sources ↗ · Risk disclosure ↗