public ExchangeRateTrend GetExchangeRateTrend()
{
var exchangeRatesForCurrentDay = _exchangeRatesStorage.GetExchangeRatesForCurrentDay();
if (!exchangeRatesForCurrentDay.Any())
{
return(ExchangeRateTrend.Unknown);
}
try
{
var currentDayTimeSeries = new TimeSeries(exchangeRatesForCurrentDay, _options.Value.TimeSeriesPeriod);
var currentDayMovingAverage = TrendIndicators.GetExponentialMovingAverage(currentDayTimeSeries.Values);
var previousDaysToConsider = _options.Value.NumberOfPreviousDaysToConsider;
var previousDaysMovingAverage = TrendIndicators.GetExponentialMovingAverage(_exchangeRatesStorage
.GetClosingPricesForPreviousDays(previousDaysToConsider).ToArray());
return(GetExchangeRateTrend(currentDayMovingAverage, previousDaysMovingAverage));
}
catch (NotEnoughDataException)
{
return(ExchangeRateTrend.Unknown);
}
}
