Barchart takes this Alpha and weights this, assigning more weight to recent activity, and less (0.5 factor) to activity at the beginning of the period.

Weighted Alpha: A measure of how much a stock or commodity has risen or fallen over a one-year period.

Average Volume: The average number of shares traded over the last 20 days.

Volume: The total number of shares or contracts traded in the current trading session.

Previous Close: The closing price from the previous trading session.

Open: The opening price for the current trading session is plotted on the day's High/Low histogram.

Day High / Low: The highest and lowest trade price for the current trading session.

Volume is also updated but is the delayed consolidated Volume from the symbol's exchange. When available, Bid and Ask information from the Cboe BZX Exchange is updated as new data is received.

The Summary Quoteboard displays snapshot quote data. If you require comprehensive real-time bids/asks/quotes, we offer a no-risk trial to one of our real-time products. As a result, the real-time prices displayed may have minor discrepancies when comparing the information with other sites offering real-time data, or with brokerage firms. Note: The Cboe BZX Exchange currently accounts for approximately 11-12% of all U.S. Real-time prices are available during market hours (9:30 AM to 4:00 PM EST). If the symbol has pre-market or post-market trades, that information will also be reflected along with the last (closing) price from the symbol's exchange.

Volume always reflects consolidated markets. During market hours, the real-time Cboe BZX price displays and new trade updates are updated on the page (as indicated by a 'flash'). Real-time prices are provided by Cboe BZX Exchange on individual U.S. The Quote Overview page gives you a snapshot view for a specific symbol.

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