> 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/ai-strategy-builder/machine-macd.md). # MACD fields 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. Let A=fast EMA(close) minus slow EMA(close), B=the signal EMA of A, and h=A−B. `fp`, `sp` and `sgp` select these three periods; defaults are 12/26/9. Each is an integer 2…50. The confirmed checks do not require fp\sp remains unconfirmed, so do not present a reversed-period example as validated numerical transfer. ## Entry — macd.entry `ec` selects one of four events. Evaluate the L branch first: * `CSM`: `A1=B0` gives L; `A1>B1` and `A0<=B0` gives S; otherwise N. * `CMZL`: `A1<0` and `A0>=0` gives L; `A1>0` and `A0<=0` gives S; otherwise N. * `BGH`: `h0>=0`, `h1=0 and h2=h0`, and not `(h1<0 and h2>=h1)` gives S. Otherwise N. * `BDH`: `0>h0>h1` and not `(0>h1>h2)` gives L. `0<=h0<=h1` and not `(0<=h1<=h2)` gives S. Otherwise N. BGH/BDH require three values and exclude continuation of the immediately preceding qualifying state. Neither is simply “histogram positive/negative”. For CSM, previous `(A=.8,B=1)`, current `(A=1.1,B=1.1)` gives L; previous equality followed by A>B does not. ## Filter — macd.filter `ft` selects a current relationship or change, not an entry event: * `BD`: A0>B0 gives IS; A0\0 and B0>0 gives IL; otherwise N. Touching zero does not qualify. * `BGDM`: A0>A1 gives IS; A0\h1 and h0>0 gives IS; h0\