Intraday price change for ALGN is about $3.13 from the day's low to the day's high.
The previous business day's price range from the open of $161.26 is expected to range from a low of $159.60 to a high of $162.73.
Price moves beyond this range are outside the average.
The previous business day's closing price may be between $161.26 and $161.27 assuming average price movements.
Note that events including news, ALGN earnings, or broad market swings will unexpectedly affect price.
Closing prices outside of this range indicate a move outside the average closing price movement.