[
  {"op": "source", "role": "price", "kind": "F64"},
  {"op": "add", "type": "ger40_lab::Momentum", "name": "mom"},
  {"op": "feed", "role": "price", "into": ["mom.series"]},
  {"op": "add", "type": "Bias", "name": "bias"},
  {"op": "connect", "from": "mom.value", "to": "bias.signal"},
  {"op": "expose", "from": "bias.bias", "as": "bias"}
]
