Intraday price change for ALXN is about $3.56 from the day's low to the day's high.
The previous business day's price range from the open of $129.25 is expected to range from a low of $127.55 to a high of $131.11.
Price moves beyond this range are outside the average.
The previous business day's closing price may be between $129.11 and $129.39 assuming average price movements.
Note that events including news, ALXN earnings, or broad market swings will unexpectedly affect price.
Closing prices outside of this range indicate a move outside the average closing price movement.