Copying whale bets in real time
The founding strategy: watch large bets hit the tape, copy them within seconds at small size. It works — but only in one narrow price band, and the band moves with the season.
The hypothesisLarge bets carry information. If a five-figure order hits a market, the bettor probably knows something — copy it fast enough, at small size, and you ride their edge.
The test
A daemon watches the public trade feed (plus a WebSocket trigger that cuts detection latency from ~46s to under 1s), and mirrors qualifying large bets with real orders at the live ask, recording the whale's price, our fill, and the slippage between them. Every copy settles at market resolution. Years of hype posts describe this strategy; the difference here is that every copy is logged with its executable entry price, so the edge can be located rather than asserted.
The result
Copying whales indiscriminately loses money. The aggregate edge lives in a narrow slice: mid-priced underdog entries, where our settled copies ran a ~66% win rate at prices that implied far less. Outside that band — the large majority of whale volume — copies settled around a 44% win rate with negative net. Sports copies held an edge only at 40–60¢ entries (+$444 over 179 settled at peak); every band below 35¢ measured negative, and one sport (tennis) has never been net-positive in our records and is now excluded entirely.
Two costs the hype posts never mention, both measured: copy slippage (our fill vs the whale's price routinely exceeds a full point — fatal to thin edges) and regime decay — a band that returned +66% ROI during a major tournament month returned −16% the following month on identical behavior. The edge is not a property of copying; it is a property of specific flows in specific seasons, and it expires.
Conclusion
Confirmed, with an asterisk the size of the finding: whale-copying profits exist but are concentrated in a minority band of a minority of flows, decay with the calendar, and are half-eaten by slippage. Anyone selling "copy the whales" as a general strategy is selling the losing majority of it. This remains our live core strategy — at small size, inside measured bands, behind a daily circuit breaker.