Siacoin's price surged yesterday on anticipation as SiaTech dropped a hint about a new product, Obelisk. Today SiaTech revealed Obelisk is the first ASIC built for Sia mining. The price has since retraced to the median level.
Take note, the age old saying "Buy The Rumour, Sell The Fact" does apply in the crypto space.
Don't let yourself be gamed on news trading.