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The Java version of the BookViewer provides a continuously updating view of the displayed data, but requires a Java 1.1 enabled browser. The HTML version provides a static snapshot of the same data, but is compatible with all web browsers. Both versions are 100% real-time, with no delays other than those inherent in your Internet connection.

The BookViewer only shows information about orders entered into the Island ECN, so it does not include any information about other orders that may exist elsewhere in the marketplace.

The BookViewer only shows data for a single stock at a time, so all data in the BookViewer relates only to the one requested stock. To see Island system-wide information (as opposed to just a single stock), check out the Island System Stats page.


Click on the appropriate number to learn more about a specific feature of the Island BookViewer.

Click to learn more...

1. Refresh (HTML version only)

The HTML version is not dynamic but an instant snapshot at the time the page was generated. Clicking on the Refresh button will update the snapshot of the current page. The Java version automatically updates the data and therefore does not need a Refresh button.


2. Island Homepage

Sends you to the Island home page.


3. System Stats

Lists some interesting Island system-wide statistics for the current trading session.


4. Help

Sends you to this Help Page.


5. Stock Symbol

The currently active stock symbol. Each Island BookViewer window can only display data for a single stock at a time, so all data displayed in this window is limited to this active stock.


6. New Stock

You can change the active stock at any time by entering a new stock symbol here and hitting the "go" button (or pressing ENTER).


7. Last Match Price

The price of the most recent match on Island. "N/A" indicates that the stock has not traded on Island yet today. 

This price is displayed in decimals. Island accepts decimal orders in up to 3 decimal places. However, the conversion of fractional orders to decimal representation sometimes requires more than 4 decimal places. To reduce confusion, in these instances the converted fractional order is rounded to 4 decimal places. Such prices are marked with a "#" symbol.


8. Last Match Time

The time of the most recent match on Island, expressed in 24-hour format based on U.S. Eastern time.


9. Today’s Activity - Orders

The cumulative number of visible orders entered so far today. This number does not include hidden orders or immediate-or-cancel orders.


10. Today’s Activity - Volume

The total number of shares matched today on Island's book. This volume counts each change of beneficial ownership once. For example, if participant "A" sells 100 shares to participant "B" on Island, Todays' Volume will increase by 100 shares.*


11. Buy and Sell Orders

Displays up to the first 15 individual buy and sell orders currently visible, open and available for instant matching. Buy orders are on the left, sell orders are on the right. Orders are listed according to price and time priority so orders higher on the list will be executed before orders lower in the list. Hidden orders are not displayed.

The background colors help to visually group together equally priced orders at first four price levels.


12. Shares

For each order, this column shows the number of shares that are currently available for an instant match. The shares displayed could be less than the original number of shares entered if the order was partially executed or partially cancelled.


13. Price

This column displays each order's limit price.

These prices are displayed in decimals. Island accepts decimal orders in up to 3 decimal places. However, the conversion of fractional orders to decimal representation sometimes requires more than 4 decimal places. To reduce confusion, in these instances the converted fractional order is rounded to 4 decimal places. Such prices are marked with a "#" symbol.


14.  Fraction Rounding Indicator

This price is displayed in decimals. Island accepts decimal orders in up to 3 decimal places. However, the conversion of fractional orders to decimal representation sometimes requires more than 4 decimal places. To reduce confusion, in these instances the converted fractional order is rounded to 4 decimal places. Such prices are marked with a "#" symbol.


15. Connection Status

Shows the state of the BookViewer's connection. (The HTML version will always show "as of" since it does not create new connections).

Possible values include:

Connecting - The applet is trying to make a new connection to the BookViewer server over the internet. You'll see this every time you request a new stock. The applet may take a second to connect, depending on the speed of your Internet connection.

Connected - The applet has successfully connected to the server and is waiting for the first packet of data to arrive.

Connection Lost - The applet's connection to the server was unexpectedly terminated. Check your internet connection and request the stock again.

Unknown Stock - The requested stock was not found on Island. This could indicated that you requested an invalid stock symbol, or that there have not been any orders entered into Island yet today for that stock. Check the stock symbol and try again.

As of - A time stamp that indicates the timeliness of the displayed data. In the Java version, this timestamp should update each time the displayed data changes or about once every 15 seconds if the displayed data is not changing. The time stamp is expressed in 24-hour format based on U.S. Eastern Time.


The Island BookViewer is a best-effort attempt to provide the public with access to a real-time view of the Island limit book. The Island BookViewer only contains information concerning Island's best bid or offer, Island's last match price, or any other information that is specific to Island's system. Furthermore, the Island BookViewer does not necessarily represent the best bid, best offer, or last sale price on NASDAQ or any other market or exchange.

The Island BookViewer is a free, Internet based service. These quotes are not guaranteed to be timely or accurate. The operation or lack thereof for this site is not any indication of the fitness of the Island ECN.

Do not use the Island BookViewer for making investment decisions, it is for informational purposes only.

 

 
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