Column Filter

What it does

Keeps a coin's value only where its mask column is true; other coins are dropped from that pick's ranking.

What happens

Used only inside a Universe. It runs at the universe's refresh or pick instants over every allowed coin, using only data that had closed by then, and its wires carry coin sets, per-coin columns or selections rather than one value per bar.

When to use

Rank momentum only among coins above their 200-day average.