Dealing with Time Zones

## load library
library(cryptoQuotes)

By default all data from the get_*-family of functions is returned with Sys.timezone() and, if not specified otherwise, all dates passed into the from and to parameters are assumed to be Sys.timezone() too.

NOTE: As the {pkgdown}-documentation gets built on Github-servers we manually specify the timezone of the from and to parameters.

In this article we will demonstrate the time zone aspect of {cryptoQuotes}.

Open, High, Low, Close and Volume (OHLC-V) with CET

Assume that you are interested in the hourly Bitcoin price action from yesterday between 16.00 and 18.00 central European time (CET). We start the example by defining the from and to parameters,

# define from
# and to
from <- as.POSIXct(
  x = paste(
    Sys.Date() - 1, "16:00:00"
  ),
  tz = "CET"
)

to <- as.POSIXct(
  x = paste(
    Sys.Date() - 1, "18:00:00"
  ),
  tz = "CET"
)

OHLC-V

As the time zone on Github servers are CET, the returned OHLC-V data is UTC as demonstrated below,

## Get hourly
## BTC between
## 16:00 and 18:00 from
## yesterday
xts::tzone(
  BTC <- get_quote(
    ticker   = "BTCUSD",
    source   = "kraken",
    interval = "1h",
    futures  = FALSE,
    from     = from,
    to       = to
  )
)
#> [1] "UTC"

All time zones can be converted using the xts::tzone()-function. Below is an example of converting the BTC to CET,

## 1) Change time
## zone to CET
BTC_CET <- BTC
xts::tzone(BTC_CET) <- "CET"

Below is table with the original index in UTC and the converted index in CET,

Time zone comparsion

Original Index	Converted Index
2024-08-15 14:00:00	2024-08-15 16:00:00
2024-08-15 15:00:00	2024-08-15 17:00:00
2024-08-15 16:00:00	2024-08-15 18:00:00