Intraday price change for ALNY is about $3.09 from the day's low to the day's high.
The previous business day's price range from the open of $80.29 is expected to range from a low of $78.57 to a high of $81.66.
Price moves beyond this range are outside the average.
The previous business day's closing price may be between $80.39 and $80.19 assuming average price movements.
Note that events including news, ALNY earnings, or broad market swings will unexpectedly affect price.
Closing prices outside of this range indicate a move outside the average closing price movement.