Why I built this: Managing capital across multiple exchanges creates a surprisingly simple but persistent problem: getting a reliable picture of your total equity, open positions and PnL requires jumping between venues. There's no single source of truth — just a trail of tabs. I couldn't find a tool that actually solved this for active traders. Most portfolio trackers are built for retail investors who want a pie chart of their coins. That's a different problem. The problem I kept running into is operational: where is my capital, what is it doing, and what's my real PnL across all venues right now? So I built ArbLens. What it does: Connect your exchange accounts via read-only API keys. ArbLens aggregates current balances with live mark-price overlay, open positions with real-time unrealized PnL, trade fill history, funding payment records, and deposit/withdrawal history — across 21 exchanges including Hyperliquid, Paradex, and on-chain wallets. Mark prices stream every 10 seconds via SSE. What makes it different: Most tools are built for portfolio visualization, not operational monitoring. ArbLens is built for active traders — incremental fill sync, live position streaming, and a funding payment ledger that helps you track carry cost across venues. Security: API keys are Fernet-encrypted before storage. ArbLens is strictly read-only — it cannot place, modify or cancel any orders. There's a free tier — no credit card required to connect your first exchange and explore the dashboard. I'd genuinely like to hear how you currently handle this — spreadsheet? Switching tabs? Something else? And if there's an exchange on your list that isn't in ours, tell me in the comments. I'll be here all day answering every question. 🙏
