Intraday price change for ALXN is about $3.65 from the day's low to the day's high.
The previous business day's price range from the open of $129.51 is expected to range from a low of $127.54 to a high of $131.18.
Price moves beyond this range are outside the average.
The previous business day's closing price may be between $129.74 and $129.28 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.