Which endpoint can I use to obtain the Profit/Loss of any given trade

I’m currently using https://collective2.com/world/apiv3/requestTradesOpen and this returns the below which includes a ‘PL’ value. This I assume is profit / loss against that trade. However, when I view the ‘Unrealised P/L’ against my strategy on the dashboard the two values don’t match up.

This obviously puts a crimp in my system correctly evaluating when to exit the trade.

Is this the correct value from which to get the trades profit/loss or do I need to look elsewhere?

{
   "ok" : "1",
   "response" : [
      {
         "closeVWAP_timestamp" : "1587106890",
         "strike" : null,
         "fullSymbol" : "LSE.SHRE",
         "open_or_closed" : "open",
         "expir" : null,
         "openVWAP_timestamp" : "1587106920",
         "currency" : "GBP",
         "underlying" : null,
         "closing_price_VWAP" : "0.31300",
         "putcall" : null,
         "openedWhenUnixTimeStamp" : "1587106884",
         "quant_closed" : "0",
         "markToMarket_time" : "2020-04-17 03:01:30",
         "opening_price_VWAP" : "0.31300",
         "trade_id" : "128616482",
         "symbol" : "LSE.SHRE",
         "quant_opened" : "16665",
         "closedWhen" : "",
         "instrument" : "stock",
         "ptValue" : "1",
         "PL" : "-145",
         "closedWhenUnixTimeStamp" : "",
         "currencyMultiplierUSD" : "1.24584",
         "openedWhen" : "2020-04-17 03:01:24",
         "long_or_short" : "short",
         "symbol_description" : "SHARE PLC",
         "exchange" : "LSE"
      },
      {
         "closeVWAP_timestamp" : "1587107306",
         "strike" : null,
         "fullSymbol" : "LSE.AAOG",
         "open_or_closed" : "open",
         "expir" : null,
         "openVWAP_timestamp" : "1587107306",
         "currency" : "GBP",
         "underlying" : null,
         "closing_price_VWAP" : "0.00240",
         "putcall" : null,
         "openedWhenUnixTimeStamp" : "1587107294",
         "quant_closed" : "0",
         "markToMarket_time" : "2020-04-17 03:08:26",
         "opening_price_VWAP" : "0.00240",
         "trade_id" : "128616554",
         "symbol" : "LSE.AAOG",
         "quant_opened" : "392156",
         "closedWhen" : "",
         "instrument" : "stock",
         "ptValue" : "1",
         "PL" : "-98",
         "closedWhenUnixTimeStamp" : "",
         "currencyMultiplierUSD" : "1.24584",
         "openedWhen" : "2020-04-17 03:08:14",
         "long_or_short" : "long",
         "symbol_description" : "ANGLO AFRICAN OIL & GAS PLC",
         "exchange" : "LSE"
      }
   ]
}