Where to get Hyperliquid historical data: candleSnapshot candles and the 5,000-candle limit, hourly funding history with pagination, your own fills, the S3 archives, rate limits and a Python script that exports candles to CSV.
What open interest means on Hyperliquid, how to convert it to USD, how to read OI with price and funding, why orders get rejected at the open interest cap, HIP-3 caps, and a Python script to pull OI from the public API.
How to use Hyperliquid testnet: claim 1,000 mock USDC from the faucet (mainnet deposit required), fix the email-login address issue, switch the API and Python SDK, and add HyperEVM testnet (chain ID 998).
How Hyperliquid TP/SL works: mark-price triggers, 10% market slippage tolerance, limit exits, position vs parent-order (OCO) attachment, API grouping, and common fill mistakes.
How Hyperliquid TWAP works: 5 minutes to 7 days, $100 minimum, 30s interval floor, 3% suborder slippage, ±20% randomize, catch-up caps, and the twapOrder / twapCancel API.
Learn what slippage and price impact cost you on Hyperliquid, how to estimate them from the order book and which order types (limit, IOC, TWAP) reduce them.
What Hyperliquid builder codes are, how bots, wallets and frontends add builder fees (up to 0.1% on perps, 1% on spot), what they cost per month, and how to check and revoke your approvals.
Max leverage per asset on Hyperliquid, how to change leverage on open positions, how leverage moves your liquidation price, effective vs selected leverage, and a sizing checklist.
What a Hyperliquid API/agent wallet can and cannot do, how to create and revoke one, nonce pitfalls, security checklist, and why portfolio tracking needs no keys at all.