I would be a bit weary of going long right now on robinhood as the market across several time frames (daily, 240 minute, weekly, etc) is extended. However, if Robinhood does continue for another leg higher it needs to start to hold the pictured zone right about now. Other wise the stock may need a deeper pullback into that deeper zone as shown below.
I would recommend you to use ATR (Average True Range). It’s a volatility indicator, when when the line edges are rising it implies volatility of the stock is increasing. And when the ATR line drifts lower, it implies that the volatility of the stock is decreasing.