private Task CreateCurrencyPair(string symbol,
                                        int pipsPosition,
                                        int ratePrecision,
                                        decimal sampleRate,
                                        string comment = null,
                                        bool activate  = false)
        {
            var cp = new CurrencyPair(symbol, pipsPosition, ratePrecision, sampleRate, comment);

            if (activate)
            {
                cp.Activate();
            }

            return(_repository.SaveAsync(cp));
        }