The 25 most liquid names in the S&P 500 and Nasdaq-100 (ranked by 20-day average dollar volume), scanned on hourly compression. The Bilbo Box is the range of the first five compression bars; once it locks, the first trade outside the box is the break. Immediate entry on the break was the winning variant in the Bilbo Box Breakout study (50,889 SPY breaks), with the edge concentrated in 1–4 bar boxes.
How to read it. The range bar shows where price sits inside the box (● above midpoint / breaking up, ● below / breaking down). Width is the box height in hourly ATR-14 multiples — tighter boxes were the better setups in the study. marks early-exit boxes, where the measured edge concentrated. RTH breaks are the tradeable ones per the study; PRE breaks showed no edge and AH breaks were net losers — boxes still form and lock on extended-hours bars (exactly as in the backtest), but only an RTH-session break is a signal.
Caveats. Bars are extended-hours hourly (top-of-hour 04:00–19:00 ET starts, 16/day), the same grid as the SPY backtest and TV charts with ETH on. Primary data is Massive 1h aggregates with SIP-filtered wicks; if that source degrades the scanner falls back to Yahoo per ticker, where pre/post wicks are unreliable and the bar body is used as the extreme outside RTH. Wicks are clipped at 2% beyond the body (the standard bad-tick rule from the studies). The last bar is in progress during the session — a "break" can un-print if the bar reverses before it closes. This is a watchlist builder, not a signal service.