Brummel
f0949578a3
Hand-wired EWMA Bollinger-band fade subgraph (price -> Ema mean + dev -> Mul square -> Ema var -> Sqrt sigma -> LinComb k-band -> Add/Sub bands -> Gt/Gt -> Latch/Latch -> Sub bias). Pins the fade direction (above mean+k*sigma -> short, below -> long), the latch hold, and flat-series -> no fade. Green on arrival (composes only existing aura-std nodes; no new node), so it is a characterization pin rather than a RED->GREEN unit. refs #137