Stop Shipping Backtests With Silent Logic Bugs
I once ran a backtest that came back with an 86.5% win rate over 680 trades. My first reaction was excitement. My second, about ten seconds later, was suspicion —…
The Undocumented GraphQL Field That Reveals Every GMX Liquidation
GMX, the perpetuals exchange on Arbitrum, runs an official public subgraph. It’s free, needs no API key, and there’s no documentation that walks through how to actually pull liquidations out…
Reading Order Book Imbalance in Real Time
Order Book Imbalance (OBI) is one of the simplest live microstructure signals you can compute: how much resting buy volume sits at the top of the book compared to resting…
Reconstructing L4 Order Books from Hyperliquid Data
Most order book data people work with is L2 — aggregated size at each price level, no visibility into individual orders. L4 goes further: every individual order, tracked from placement…
Why Backtest Ordering Matters: Inside HyperBFT’s Consensus Model
Most retail backtesting frameworks process historical trades in whatever order the data file lists them — usually just sorted by timestamp. That’s a reasonable assumption on a centralized exchange with…
Webhook Signature Verification in FastAPI: Don’t Trust Any Payload
A webhook endpoint that processes any POST request it receives, without checking who actually sent it, is an unauthenticated write path into your system. Anyone who finds the URL can…
Stop Sharing API Keys: HWID Binding for License Validation in Python
A plain API key or license string has one structural weakness: it’s just a string. Anyone who has it can use it, from anywhere, on any machine — and license…
Funding Rate Arbitrage on Hyperliquid: A Practical Introduction
Perpetual futures use funding payments between longs and shorts to keep the contract price anchored to spot. When the same asset trades on multiple venues, funding rates rarely line up…
OpenAI and Anthropic Are Trading as Perpetuals on Hyperliquid
You can’t buy shares in OpenAI or Anthropic on any public exchange — neither has gone public. But you can trade a synthetic perpetual on Hyperliquid whose price directly tracks…
How to Calculate Your Hyperliquid Liquidation Price
Most “liquidation price” formulas floating around trading communities are simplified approximations — they ignore maintenance margin tiers and the exact per-asset max leverage Hyperliquid actually enforces. Close enough for a…