loop HistoryDealsTotal() printing zero? or am i wrong here?

[Chi Hong Au Yeung]

I wanna loop through history deals but why am I getting print zero here? i tried  HistoryDealsTotal() and HistoryOrdersTotal() both printing zero, what seems to be wrong here? tks all.

double totalProfitLoss = 0.0;

int totalDeals = HistoryDealsTotal();

    Print("Total historical deals__:", totalDeals);

    for (int i = totalDeals - 1; i >= 0; i--)

    {

        // Select the deal by index

        if (HistoryDealSelect(i))

        {

            ulong ticket = HistoryDealGetTicket(i);

            double profit = HistoryDealGetDouble(ticket, DEAL_PROFIT);

            double commission = HistoryDealGetDouble(ticket, DEAL_COMMISSION);

            double swap = HistoryDealGetDouble(ticket, DEAL_SWAP);

            Print("Deal Ticket__:", ticket," Profit__:", profit," Commission__:", commission," Swap__:", swap);

                  totalProfitLoss += profit + commission + swap;

        }

    }

[Samuel Manoel De Souza]

You need select the history first.

https://www.mql5.com/en/docs/trading/historyselect

[Chi Hong Au Yeung]

Samuel Manoel De Souza #:

You need select the history first.

https://www.mql5.com/en/docs/trading/historyselect

thank you, solved it.