How can i test if the last trade was profitable

Hi i want to test and retrieve the result of the last trade ie was it profitable or lossing trade and return value 1 profitable -1 lossing trade

does anyone know ho to do this kind regards

int OrdersHistoryTotal( )
Returns the number of closed orders in the account history loaded into the terminal. The history list size depends on the current settings of the "Account history" tab of the terminal.
Sample:
// retrieving info from trade history
int i,hstTotal=OrdersHistoryTotal();
for(i=0;i<hstTotal;i++)
{
//---- check selection result
if(OrderSelect(i,SELECT_BY_POS,MODE_HISTORY)==false)
{
Print("Access to history failed with error (",GetLastError(),")");
break;
}
// some work with order
}
The most recent closed is probably index 0, but not sure, from there use other order key words open price and close price etc to compute the p/l.