Who writes this.
Postmortem is built and written by Darwin Barredo, a crypto futures trader. The tool exists because he wanted one and could not find it.
Why this thing exists
The honest origin story is unflattering. I kept a trading journal the way most people do — a spreadsheet, filled in when I felt like it, which turned out to be after the wins. The losses went unrecorded, so the pattern in them stayed invisible, and I paid tuition for the same lesson several times over before noticing it was the same lesson.
Every journal I tried had the same shape: it stored the trades and left the reviewing to me. That is exactly the step that stops happening after a losing week — the moment you most need the review is the moment you least want to open the app. So Postmortem was built to invert it. It syncs the trades whether or not you are in the mood, stamps a verdict on each one, and names the habit costing you the most money with a figure attached. You do not have to go looking for the bad news; it arrives.
It is deliberately narrow. Crypto futures only — no equities, no options, no forex — because funding, leverage and liquidation distance are what make perps different, and a journal that has to model four asset classes ends up modelling none of them exactly. If you trade a brokerage account too, there are better tools for that, and the comparison pages say so plainly.
What I trade, and what that means for this
I trade crypto perpetual futures on the same exchanges Postmortem syncs — Binance, Bybit, OKX, MEXC, Bitget, BingX and Bitunix. Everything written here comes out of that: the four minutes after a loss is a real pattern I found in my own fills before it was a feature, and the position sizer exists because I once put on a position several times the size I meant to.
What that does not make me is your analyst. I am not a licensed adviser, I do not manage anyone’s money, and I have no interest in selling signals. The only thing I am claiming expertise in is the narrow one this site is about: what a crypto futures trading record looks like, and what can be read off it.
What this site will and won’t do
- Numbers come from your fills, not from a guess
Every figure Postmortem shows you is computed from trades pulled off the exchange with a read-only key — funding and fees netted out, leverage recorded as traded. Where the data does not support an answer, the app says "unknown" instead of rendering a confident number nobody checked.
- Competitor claims are sourced and dated
Every comparison page names where each figure came from and the day it was read. When we cannot verify something a competitor does, the page says that rather than filling the gap with a guess that flatters us.
- This is a journaling tool, not advice
Postmortem does not tell you what to trade, and nothing on this site is financial advice. It measures what you already did and names the pattern. What you do about it is yours.
- Read-only keys, always
The app only ever asks for API keys with trading and withdrawals disabled, signs exchange requests in your browser so the secret never travels in plain text, and stores secrets AES-256-encrypted. A journal has no business being able to move your money.
Recent writing
- How to Track Crypto Across Multiple Wallets and Exchanges
Four exchanges, three wallets and a Ledger in a drawer. Here’s how to get one honest number out of that — and which numbers to distrust.
- Weighted Average Cost Basis for Crypto, Explained
Buy at $30k, buy again at $70k, sell a third. What did the coins you still hold cost you? The arithmetic is easy; the edge cases are where trackers lie.
- Why Your Portfolio Tracker Shows the Wrong Price
You open your tracker and a wallet you barely use is worth $40,000. It isn’t. Here’s the mechanism, and what a tracker should do instead.
- How to Journal Crypto Futures Trades (Without Quitting in a Week)
Most trading journals die by Friday because they rely on willpower. Here’s a system that survives a losing streak.
Corrections and contact
If a number on this site is wrong — a competitor’s price, a feature we credited or failed to credit, a formula that does not check out — say so and it gets fixed and dated. The comparison pages carry their verification date at the top for exactly this reason.
Reach me at support@postmortem-tradingjournal.com. Account deletion is self-serve and takes two taps — here is how.
Postmortem is a journaling and analytics tool. Nothing on this site is financial advice, and past results — yours or anyone else’s — do not predict future ones. Trading leveraged futures can cost you more than you put in.