OptionalopenThe period's opening price, where the chart records one.
Optional because a real and common price chart does not have it.
Highcharts registers three price series and only two carry an open:
candlestick and ohlc do, and hlc draws the same high, low and
close without it. Required, the field forced that chart to be declined
outright -- announcing it as an error bar would have been exact in the
data and wrong in the name, which is the trade #1140 rules out.
The same shape ErrorBarPoint.y took in #1047 for the band that draws
only bounds: absent means the chart never had one, not that it is zero.
Its absence removes more than a row. The body is what an open makes -- so a candle without one has no bullish/bearish/neutral trend, no shape, and no pattern with its neighbours, because every one of those is a statement about the body. Candlestick drops the section, the trend and all of the pattern asides together rather than announcing any of them empty.
OptionalvolumeOptional volume data. May be undefined when source (e.g., Google Charts) doesn't provide it.
OptionaltrendWhich way the body ran, absent on a candle with no CandlestickPoint.open to measure it against.
Data point for candlestick charts with OHLC values, volume, and trend information.