I’d like to suggest adding an attribute or two to allow for strategy tagging and/or denoting a sub-portfolio on the Position object. Perhaps this could be updated with a POST?
{
"asset_id": "c1f59ac6-1836-416a-9837-5fa3b1d1da9b",
"symbol": "BNKU",
"exchange": "ARCA",
"asset_class": "us_equity",
"asset_marginable": false,
"qty": "120",
"avg_entry_price": "34.69",
"side": "long",
"market_value": "4340.4",
"cost_basis": "4162.8",
"unrealized_pl": "177.6",
"unrealized_plpc": "0.0426635918132027",
"unrealized_intraday_pl": "2.4",
"unrealized_intraday_plpc": "0.0005532503457815",
"current_price": "36.17",
"lastday_price": "36.15",
"change_today": "0.0005532503457815",
"qty_available": "0"
},