> For the complete documentation index, see [llms.txt](https://docs.itradingbot.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.itradingbot.net/uk/ai-strategy-builder/machine-momentum.md). # Momentum reference Shared reading rules — index notation, the `L`/`S`/`N` codes, crossings and Reverse — are on [Signal passports](https://docs.itradingbot.net/ai-strategy-builder/signal-passports). Main backtest settings and the card schema are on [Settings and card schema](https://docs.itradingbot.net/ai-strategy-builder/machine-settings). The behaviour contract is [Rules for AI assistants](https://docs.itradingbot.net/ai-strategy-builder/assistant-rules). Knowledge package 0.6.1, checked 22 September 2026, build 03613bfa. Use the shared role, Reverse and timing rules. Momentum is the difference between the current close and close p bars earlier. It is a **price difference**, not percentage return. p is an integer period, default 10; the reviewed constructor does not establish a complete permitted numeric range. Do not invent one from another oscillator. ## Entry — momentum.entry M1<0 and M0>=0 gives L; M1>0 and M0<=0 gives S; otherwise N. This is a zero crossing with current equality included. ## Filter — momentum.filter `BZL`: M0>0 gives IS; M0<0 gives IL; zero gives N. Equality is therefore different from the entry endpoint. `BGD`: M0>M1 gives IS; M0\