'close' (default) evaluates only the closes, giving a flat bar whose four
values are equal: exact, and honest about what two OHLC bars can support.
'interval' additionally bounds the high and low as described above.
Optionalprimary
primary?:string
The leg whose bars define the time grid. Defaults to the first symbol.
Every other leg is matched to it by timestamp; a bar with no match on some
leg produces a gap rather than a guess.
'close'(default) evaluates only the closes, giving a flat bar whose four values are equal: exact, and honest about what two OHLC bars can support.'interval'additionally bounds the high and low as described above.