jiyoung kim's profile on Product Hunt

About

I build market-data apps at SIGNUM HQ, a one-person studio. The thing I keep coming back to: the numbers that actually explain why a US stock moved — how much volume printed off-exchange, where options open interest is stacked, where dealers flip from long to short gamma — are priced for institutions, not for the person reading the headline. So I ship them free, with no account, in English, Korean and Japanese. Three apps so far: SIGNUM HQ (the full picture), Undercurrent (the money behind each headline), and Why'd It Move? (one stock, one question, every night). Information and education only — not investment advice.

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p/signum-hq

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19h ago

I shipped institutional-grade data for free and the hardest part was not the data

SIGNUM HQ shows dark pool share, max pain, gamma exposure, the dealer gamma flip and unusual sweeps per US ticker, free, no account. Most of that lives behind terminals that cost more per month than rent.

Getting the data was the part I expected to be hard. It was not. Here is what actually was:

p/undercurrent

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20h ago

We tracked every time the news and the money disagreed. The money is losing.

I build a free app that puts each market headline next to what institutional money actually did on that ticker dark pool share, options positioning, flow. When the story and the money point opposite ways, we mark it a divergence.

The uncomfortable part: we score them. Three days after every divergence, we check who was right and the running tally stays on screen where anyone can see it. As of this morning it reads: money 36, news 42, draw 62.

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3h ago

Undercurrent - See the institutional money behind every headline

Every market headline, placed next to what the institutional money actually did on that ticker. Dark pool share, max pain, call wall and put floor, put/call ratio and the day's options flow — numbers that normally sit behind a professional terminal. When the story and the money point opposite ways, we mark it. 595 US tickers. 2–3 editions a day. English, Korean, Japanese. Free, no account, no paywall. Information and education only — not investment advice.