Ann: 2017 Financial Year Results, page-126

Gap filling is not an overly reliable form of technical analysis. Sure on many charts it happens but on many others the gaps never get filled.

More plausible answer for today's sell off is an ETF selling or some other gold fund hitting a share price that doesn't have much buying support at the moment. Many of the bigger gold names are getting hit today such as EVN, NST, SAR, PRU.

Anyway, I just picked up some more at 41.5.