When reporting an Execution, LegOrderQty may be used on Execution Report to echo back original LegOrderQty submission.
This field should be used to specify OrderQty at the leg level rather than LegQty (deprecated).
LegOptionRatio is provided on Covering leg to create a delta neutral spread. In Listed Derivatives, LegDelta LegOptionRatio
is multiplied by LegOptionRatio and OrderQty to determine the covering quantity