[
  {"op": "doc", "text": "NY first-session-bar momentum: SMA(5)-SMA(20) sign, traded only on the first 09:30 America/New_York 15m session bar"},
  {"op": "source", "role": "price", "kind": "F64"},
  {"op": "add", "type": "SMA", "name": "fast", "bind": {"length": {"I64": 5}}},
  {"op": "add", "type": "SMA", "name": "slow", "bind": {"length": {"I64": 20}}},
  {"op": "feed", "role": "price", "into": ["fast.series", "slow.series"]},
  {"op": "add", "type": "Sub", "name": "sub"},
  {"op": "connect", "from": "fast.value", "to": "sub.lhs"},
  {"op": "connect", "from": "slow.value", "to": "sub.rhs"},
  {"op": "add", "type": "Sign", "name": "sgn"},
  {"op": "connect", "from": "sub.value", "to": "sgn.value"},
  {"op": "add", "type": "Session", "name": "sess",
   "args": {"tz": "America/New_York", "open": "09:30"},
   "bind": {"period_minutes": {"I64": 15}}},
  {"op": "feed", "role": "price", "into": ["sess.trigger"]},
  {"op": "add", "type": "EqConst", "name": "isfirst", "bind": {"target": {"I64": 1}}},
  {"op": "connect", "from": "sess.bars_since_open", "to": "isfirst.value"},
  {"op": "add", "type": "Const", "name": "flat", "bind": {"value": {"F64": 0.0}}},
  {"op": "feed", "role": "price", "into": ["flat.clock"]},
  {"op": "add", "type": "Select", "name": "gate"},
  {"op": "connect", "from": "isfirst.value", "to": "gate.cond"},
  {"op": "connect", "from": "sgn.value", "to": "gate.then"},
  {"op": "connect", "from": "flat.value", "to": "gate.otherwise"},
  {"op": "add", "type": "Bias", "name": "bias", "bind": {"scale": {"F64": 1.0}}},
  {"op": "connect", "from": "gate.value", "to": "bias.signal"},
  {"op": "tap", "from": "sub.value", "as": "spread"},
  {"op": "tap", "from": "isfirst.value", "as": "first_bar"},
  {"op": "tap", "from": "gate.value", "as": "gated_signal"},
  {"op": "tap", "from": "slow.value", "as": "slow_ma"},
  {"op": "expose", "from": "bias.bias", "as": "bias"}
]