Highest

What it does

Returns the maximum of the source across the lookback window (including the current bar).

What happens

Recomputed once per candle from its wired source, incrementally (constant work per bar). It emits no value until the warmup period has passed; after that it produces a value every bar.

When to use

Breakout levels, channel tops, and trailing references.

Gotchas

• Includes the current bar — for a prior-high breakout, offset or compare deliberately.