Which structures can the Finder scan?

The Finder scans single-expiration structures up to its leg budget, two legs on Starter and three on Pro and Edge, so verticals, straddles, strangles, and ratio structures are its territory.

Four-leg structures (iron condors, butterflies), multi-expiration structures (calendars, diagonals), and stock-leg structures (covered calls, collars) are built and priced in the Builder instead, where all 58 templates are always available. The Finder finds; the Builder composes.