CMD:order(playerid, params[])
{
        new amount;
    if (sscanf(params, "i", amount)) return SendClientMessage(playerid, -1, "USAGE: /order [amount]");

    Player[playerid][Order] += amount; //Change it with your user system.

    new string[80];
    format(string, sizeof(string), "* You got %i of amount", amount);
    SendClientMessage(playerid, -1, string);
    return 1;
}

CMD:removeorder(playerid, params[])
{
        new amount;
    if (sscanf(params, "i", amount)) return SendClientMessage(playerid, -1, "USAGE: /removeorder [amount]");

    Player[playerid][Order] -= amount; //Change it with your user system.

    new string[80];
    format(string, sizeof(string), "* You removed %i of amount", amount);
    SendClientMessage(playerid, -1, string);
    return 1;
}