LiveLeg

Summary view of a live position leg (contract + quantity + pricing metadata).

Field	Type	Required	Nullable	Default	Description
Id	int	Yes	No		Live leg id.
Name	str	Yes	No		User-facing leg name or response key for display and diagnostics. Use ExecPlanLegRef.ExecPlanLegId as the stable identity for v2 order and paper-fill workflows.
LiveContract	LiveContract	Yes	No		Contract specification for this leg.
LegGroupId	int	Yes	No		Leg group id within the execution plan.
CreatedAt	datetime	Yes	No		UTC timestamp when the leg was created.
ClosedAt	datetime	Yes	Yes		UTC timestamp when the leg was closed, or null if still open.
LivePositionId	int	Yes	No		Parent live position id.
AccountId	str	Yes	No		Broker account id that owns this position/leg.
Underlying	str	Yes	No		Underlying symbol for this leg (e.g. AAPL, SPX).
Qty	Decimal	Yes	No		Signed quantity for this leg (positive = long/buy, negative = short/sell). 0 is used for marker legs.
AvgEntryPrice	Decimal	Yes	No		Average entry price including commission (differs from LiveExecution.Price which excludes commission).
UserSetRealizedPnL	Decimal	Yes	Yes		Optional user-specified realized PnL adjustment for this leg.
TrackedRealizedPnL	Decimal	Yes	Yes		Realized PnL tracked by MesoLive from executions (when available).