Periods count candles, so the span they cover follows the range.
Scroll to zoom, drag to pan, or use the box-zoom tool at the top right. Attested oracle prices only. A gap in oracle coverage is left as a gap and is never interpolated.
90 days at hourly resolution. Prices are signed attestations from the General Protocols oracles, the same ones BCH Bull settles its contracts against, so a premium and the price behind it come from one source.