Arrail Group (6639.HK, HKSE) +4.57% intraday Mar 19 2026: oversold bounce to HKD 2.00

6639.HK stock opened the Hong Kong session stronger and is trading at HKD 1.83, up 4.57% intraday on 19 Mar 2026 as buyers test a short-term oversold bounce. Volume has surged to 8,867,500.00 shares versus an average of 916,050.00, signalling a high-probability rebound trade for intraday momentum players. We examine valuation, liquidity, technical context and model forecasts to frame tactical entries and risk limits for Arrail Group Limited (6639.HK) on the HKSE.