Determining the symbol for the most recent loss

[Edwin Waithaka Gichigi]

Hi fellow programmers, i am trying to find a way of storing the symbol of my most recent trade that closed with a loss but i have no idea as to where to even begin. I would apreciate any nudge in the correct direction.

[Alain Verleyen]

Please start to edit your post and remove all these uppercases. Thank you.

[William Roeder]

No need to store it, just go through history and find it.
MT5: first select a position via CPositionInfo, directly, or by 'MT4Orders' library (2016)

MT4:

1. Do not assume history has only closed orders.
             OrderType() == 6, 7 in the history pool? - MQL4 programming forum (2017)

2. Do not assume history is ordered by date, it's not.
             Could EA Really Live By Order_History Alone? (ubzen) - MQL4 programming forum (2012)
             Taking the last profit and storing it in a variable | MQL4 - MQL4 programming forum #3 (2020.06.08)

3. Total Profit is OrderProfit() + OrderSwap() + OrderCommission(). Some brokers don't use the Commission/Swap fields. Instead, they add balance entries. (Maybe related to Government required accounting/tax laws.)
             "balance" orders in account history - Day Trading Techniques - MQL4 programming forum (2017)

   Broker	History
   FXCM	Commission - <TICKET> Rollover - <TICKET>
   	>R/O - 1,000 EUR/USD @0.52
   	#<ticket>  N/A
   OANDA	Balance update Financing (Swap: One entry for all open orders.)

[Haruto Rat]

You'd want to start by defining "most recent" — is it "most recently opened" or "most recently closed"?

For "most recently closed", it'd be something like this:

// This is supposed to be a script (not an indicator or EA)
void OnStart()
  {
   HistorySelect(0,TimeCurrent()); //Select all trading history;

   //some variables we'll need...
   long LastLossTime=0;
   long LastLossTicket=0;

   for(int i=0; i<HistoryDealsTotal(); i++) //Cycle through the history
     {
      ulong ticket=HistoryDealGetTicket(i);

      //IF: it's a loss and more recent than previous one found...
      if(HistoryDealGetDouble(ticket,DEAL_PROFIT)<0&&HistoryDealGetInteger(ticket,DEAL_TIME)>LastLossTime)
        {
         LastLossTime=HistoryDealGetInteger(ticket,DEAL_TIME); //update last found loss time
         LastLossTicket=HistoryDealGetInteger(ticket,DEAL_TICKET); //take note of the ticket number
        }
     }

   //Now that we've cycled through the history, did we find any losses?
   if(LastLossTime>0)
     {
      string LastLossSymbol=HistoryDealGetString(LastLossTicket,DEAL_SYMBOL);
      PrintFormat("Most recent loss incurred at %s in %s.",TimeToString(LastLossTime),LastLossSymbol);
     }
   else
     {
      Print("Most recent loss: none found!");
     }
  }

Notes:

• this is a crude example I threw together in 10 minutes or so, not to be taken as an example of good and proper coding :D (for example, I'm getting DEAL_TIME twice)
• if your deal history contains separate commissions or charges (e.g. islamic account), you'll need to introduce additional filters to filter those out, see Deal properties for more info