Helius Medical Technologies is trading at $3.12, up 8.3% pre-market, with no clear company-specific catalyst identified for September 24. - Closed at $2.88 on September 23; coverage reported no September 24 announcement, earnings release, financing or regulatory catalyst. - B. Riley raised its price target to $4.00 from $3.50 on September 22; its connection to the move is unclear. - Shares rose 20.52% on September 18 and 12.68% on September 21, then fell 11.93% on September 23. Broader futures are lower, so macro sentiment does not clearly explain the gain.