Features
Built to make you face your losing trades.
Postmortem is a forensic crypto futures trading journal. It syncs your trades, stamps a verdict on every loss, sizes your positions by risk, and lets you backtest a setup before you risk real money. Alongside it — and deliberately walled off from it — a portfolio tracker for what you actually hold across wallets and exchanges.
AUTO-SYNC
Automatic Crypto Futures Trade Sync
Connect a read-only API key and Postmortem auto-syncs every futures trade from Binance, Bybit, OKX and 4 more exchanges — P&L, fees and R computed for you.
Learn more →POSITION SIZING
Crypto Futures Position Size Calculator
Size any crypto futures trade by risk in two inputs. Enter capital, risk %, entry and stop — get exact position size, required margin and losses-to-ruin.
Learn more →BACKTESTING
Crypto Futures Backtesting — Blind Chart Replay
Backtest a setup honestly: replay real market history bar by bar from a hidden date, no hindsight. See the win rate a setup actually has.
Learn more →PORTFOLIO
Crypto Portfolio Tracker — Wallets & Cost Basis
Track what you hold across exchange spot accounts and on-chain wallets on nine chains, with weighted-average cost basis from a ledger you control.
Learn more →How the journal fits together
These aren’t separate tools that happen to share a login. They’re one loop, and the loop is the product: you can’t diagnose a loss you never recorded, you can’t fix a mistake nobody named, and you can’t trust a setup you only ever tested by trading it.
The portfolio tracker sits outside this loop on purpose. What you hold and how you trade are different questions, and letting spot bags count as trading capital is how a 1% risk quietly becomes a 4% one.
01
Sync, so the record is complete
A read-only API key pulls every fill from your exchange and rebuilds it into round-trip trades with P&L, fees and R already computed. This matters more than it sounds: a journal you fill in by hand is a journal of the trades you felt like recording, which is never the bad ones.
02
Get a verdict, so the loss has a name
Every closed trade comes back CLEAN, FLAGGED or MIXED, with the specific mistake tagged — no stop, oversized, revenge entry, held through funding. A loss you took by the rules and a loss you took by tilting look identical on an equity curve. They are not the same trade, and they do not have the same fix.
03
Size by risk, so the next one can’t bury you
The position size calculator turns capital, risk percent, entry and stop into an exact position size, the margin it needs, and how many of these in a row would end you. Most blown futures accounts are not a strategy failure — they are one correct-looking trade sized four times too big.
04
Backtest blind, so you learn without paying tuition
Chart replay walks a setup forward one candle at a time with the right-hand side of the chart hidden, so you cannot cheat by peeking at the outcome. It is the only honest way to find out whether a setup has an edge before you fund it.
Run it for a month and the journal stops being a diary and starts being evidence — a ranked list of what actually costs you money, in your own trades, with the losses you’d rather not look at still in the dataset.
Common questions
Do I need to connect an exchange to use Postmortem?
No. The free plan works entirely by manual entry, and the position size calculator needs no account at all. Connecting a read-only API key just removes the typing — and with it the temptation to quietly skip your worst trades.
Which exchanges does the auto-sync support?
Binance Futures, Bybit, OKX, MEXC, Bitget, BingX and Bitunix, all through read-only API keys. Create the key with trading and withdrawals disabled — Postmortem only ever needs to read your history.
Is this for spot trading or futures?
The journal is built for futures — crypto perpetuals specifically, with leverage, funding, liquidation distance and R-multiples first-class throughout. Spot holdings are handled separately by the portfolio tracker, which covers exchange spot accounts and on-chain wallets across nine chains. The two live in different workspaces and deliberately share no numbers, so your holdings can never inflate the risk-per-trade math.
What's the difference between the journal and the portfolio?
The journal answers "how did I trade" — round-trip futures trades, verdicts, mistakes, expectancy. The portfolio answers "what do I own" — coin balances across wallets and exchanges, with weighted-average cost basis from a ledger you control. A workspace switcher moves between them, and that switcher is the only place the two touch.
What do I actually get on the free plan?
Auto-sync for one exchange, your last 30 days analysed, the full leak diagnosis and a verdict on every trade, plus the position size calculator and journaling — no card, no trial clock. Longer history, extra exchanges, the weekly digest, backtesting and portfolio tracking are the paid tiers.