There is no clear indication as of to why Robinhood is placing a limit on HUSA . The latest news only indicates it is heavily undervalued at 90% below evaluation. I see no evidence of heavy shorts, high influx in volume , or other indicators to warrant a limit being placed by any brokerage. I would keep my eye on this stock as there are signs of life for potential rebound. Federal versus State issues ongoing with Texas indicate that some Texas based firms may benefit greatly by comparison nationally. There are some signs of rounding the bottom of the bowl with this stock when viewed long term. Recent CEO changes may drive the company forward to a better price point. The stock being trade limited like GME and AMC has led me to believe I would at least at this to your watchlist. I see a large potential for both short and long gains given the very cyclical nature of this stock.