tq_get() Quandl data is returned newest to oldest

[DavisVaughan]

Most tq_get sources return data oldest to newest, and many functions rely on this format. Quandl data is not returned that way.

(Thanks to Rick for the example)

library(tidyquant)

CL_F1 = tq_get('CHRIS/CME_GC1', get = 'quandl')

ggplot(subset(CL_F1,date > '2016-01-01'),aes(x = date, y = settle)) +
  geom_line() +                  
  geom_ma(ma_fun = EMA, n = 126)

The EMA is thrown off and calculated backwards because of this. Arrange quandl data using something like:

CL_F1_multi = tq_get(x = c('CHRIS/CME_GC1', 'CHRIS/CME_C10'),
               get = 'quandl')
CL_F1_multi_sorted <- CL_F1_multi %>%
    mutate(symbol = forcats::as_factor(symbol)) %>%
    arrange(symbol, date) %>%
    mutate(symbol = as.character(symbol))

Converting to factor will take care of arrange attempting to order symbol alphabetically and ruining the user defined order.

EDIT: Going to overwrite the Quandl option order = "asc" instead.