Create Financial Charts
Charting tool to create standard financial charts given a time series like object. Serves as the base function for future technical analysis additions. Possible chart styles include candles, matches (1 pixel candles), bars, and lines. Chart may have white or black background.
reChart allows for dynamic changes to the chart without
having to respecify the full chart parameters.
chartSeries(x,
type = c("auto", "candlesticks", "matchsticks", "bars","line"),
subset = NULL,
show.grid = TRUE,
name = NULL,
time.scale = NULL,
log.scale = FALSE,
TA = 'addVo()',
TAsep=';',
line.type = "l",
bar.type = "ohlc",
theme = chartTheme("black"),
layout = NA,
major.ticks='auto', minor.ticks=TRUE,
yrange=NULL,
plot=TRUE,
up.col,dn.col,color.vol = TRUE, multi.col = FALSE,
...)
reChart(type = c("auto", "candlesticks", "matchsticks", "bars","line"),
subset = NULL,
show.grid = TRUE,
name = NULL,
time.scale = NULL,
line.type = "l",
bar.type = "ohlc",
theme = chartTheme("black"),
major.ticks='auto', minor.ticks=TRUE,
yrange=NULL,
up.col,dn.col,color.vol = TRUE, multi.col = FALSE,
...)x |
an OHLC object - see details |
type |
style of chart to draw |
subset |
xts style date subsetting argument |
show.grid |
display price grid lines? |
name |
name of chart |
time.scale |
what is the timescale? automatically deduced (broken) |
log.scale |
should the y-axis be log-scaled? |
TA |
a vector of technical indicators and params, or character strings |
TAsep |
TA delimiter for TA strings |
line.type |
type of line in line chart |
bar.type |
type of barchart - ohlc or hlc |
theme |
a chart.theme object |
layout |
if |
major.ticks |
where should major ticks be drawn |
minor.ticks |
should minor ticks be draw? |
yrange |
override y-scale |
plot |
should plot be drawn |
up.col |
up bar/candle color |
dn.col |
down bar/candle color |
color.vol |
color code volume? |
multi.col |
4 color candle pattern |
... |
additional parameters |
Currently displays standard style OHLC charts familiar in financial applications, or line charts when not passes OHLC data. Works with objects having explicit time-series properties.
Line charts are created with close data, or from single column time series.
The subset argument can be used to specify a
particular area of the series to view. The underlying
series is left intact to allow for TA functions to
use the full data set. Additionally, it is possible
to use syntax borrowed from the first and last
functions, e.g. ‘last 4 months’.
TA allows for the inclusion of a variety of
chart overlays and tecnical indicators. A full list is
available from addTA. The default TA argument is
addVo() - which adds volume, if available, to the
chart being drawn.
theme requires an object of class chart.theme, created
by a call to chartTheme. This function can be used to modify the
look of the resulting chart. See chart.theme for details.
line.type and bar.type allow further fine tuning of
chart styles to user tastes.
multi.col implements a color coding scheme used in some
charting applications, and follows the following rules:
grey => Op[t] < Cl[t] and Op[t] < Cl[t-1]
white => Op[t] < Cl[t] and Op[t] > Cl[t-1]
red => Op[t] > Cl[t] and Op[t] < Cl[t-1]
black => Op[t] > Cl[t] and Op[t] > Cl[t-1]
reChart takes any number of arguments from the original
chart call — and redraws the chart with the updated parameters.
One item of note: if multiple color bars/candles are desired,
it is necessary to respecify the theme argument. Additionally
it is not possible to change TA parameters at present. This must be
done with addTA/dropTA/swapTA/moveTA commands.
Returns a standard chart plus volume, if available, suitably scaled.
If plot=FALSE a chob object will be returned.
Most details can be fine-tuned within the function, though the code does a reasonable job of scaling and labelling axes for the user.
The current implementation maintains a record of actions carried
out for any particular chart. This is used to recreate the original when
adding new indicator. A list of applied TA actions is available with a call
to listTA. This list can be assigned to a variable and used in new
chart calls to recreate a set of technical indicators. It is also possible
to force all future charts to use the same indicators by calling setTA.
Additional motivation to add outlined candles to allow for scaling and advanced color coding is owed to Josh Ulrich, as are the base functions (from TTR) for the yet to be released technical analysis charting code.
Many improvements in the current version were the result of conversations with Gabor Grothendieck. Many thanks to him.
Jeffrey A. Ryan
Josh Ulrich - TTR package and multi.col coding
## Not run:
getSymbols("YHOO")
chartSeries(YHOO)
chartSeries(YHOO, subset='last 4 months')
chartSeries(YHOO, subset='2007::2008-01')
chartSeries(YHOO,theme=chartTheme('white'))
chartSeries(YHOO,TA=NULL) #no volume
chartSeries(YHOO,TA=c(addVo(),addBBands())) #add volume and Bollinger Bands from TTR
addMACD() # add MACD indicator to current chart
setTA()
chartSeries(YHOO) #draws chart again, this time will all indicators present
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.