--Oleg Kobchenko wrote:
> There is also filled/hollow candlesticks charts.
>
> http://stockcharts.com/school/doku.php?id=chart_school:chart_analysis:what_are_charts
>
I thought these would be quite easy to implement by combining a hilo plot and a
floating bar plot, but ran in to a couple of issues.
A) The way the horizontal position of the bars and the hilo lines are
calculated doesn't seem to be compatible so the bars are not centred on the
lines except for the middle datapoint. There may be a way to force these to
overlap?
B) The floating bar plot type forces the y range to include 0 which means that
small changes in values a long way from 0 don't show up well. Manually
specifying the yrange, (eg. yrange 60 80) only affects the max value not the
minimum.
plot_candlestick data
'yrange 60 80' plot_candlestick data
'yrange 0 10' plot_candlestick data-65
plot_candlestick=: 3 : 0
''plot_candlestick y
:
hl=. 1 2{y
oc=. 0 3{y
oc=. (<./ , (] (|@:*"1) 0&> ,: 0&<)@:-/) oc
ntics=. {:$hl
pd 'reset'
pd 'xticpos ',": i.ntics
pd 'pensize 2'
pd x
pd 'color blue'
pd 'type hilo'
pd hl
pd 'color white,blue'
pd 'barwidth 0.2'
pd 'type fbar'
pd oc
pd 'show'
)
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