Jack Chen on Muck Rack

Jack Chen

Palo Alto
As seen in: Medium, The Startup, Forbes, Nature, Wiley Online Library, BMJ Open, Gut Journal, Science Magazine, VnExpress.net, NRK and
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Articles

I open-sourced every Binance and OKX 2026 fee tier as JSON (+ a calculator)

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By Jack Chen
| DEV Community
If you've ever written a backtest or a fee-aware order router for Binance or OKX, you've hit this wall: the exchanges publish their fee schedules as HTML tables that change without notice, and there's no clean machine-readable source. So you end up hardcoding 0.0004 somewhere and forgetting about it until your live PnL doesn't match your sim. I got tired of that, so I open-sourced the whole thing.
Open in Who Shared Issue with article?

The Fee Assumption Quietly Wrong in Most Backtests

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By Jack Chen
| DEV Community
If you've written a crypto backtester, there's a decent chance one line in it is quietly wrong. It's not the slippage model, not the funding rate, not the fill logic. It's the fee.
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Tu1242 INGESTIBLE ELECTRONIC SYSTEM FOR CLOSED-LOOP DIAGNOSIS AND TREATMENT OF GASTRIC BLEEDING WITH MONTH-LONG PREVENTATIVE MONITORING

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By Jack Chen, Anthony Sergnese, Ricardo Monteiro Bastos
| Gastrointestinal Endoscopy
Also available on ScienceDirect
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