Intraday price change for ALNY is about $3.34 from the day's low to the day's high.
The previous business day's price range from the open of $80.50 is expected to range from a low of $78.91 to a high of $82.26.
Price moves beyond this range are outside the average.
The previous business day's closing price may be between $80.19 and $80.81 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.