realtime

IQFEED asynchronous level 1 data

Syntax

realtime(Q,S)
realtime(Q,S,F)
realtime(Q,S,elistener,ecallback)


Description

realtime(Q,S) returns asynchronous level 1 data using the current update field list, default socket listener, and event handler.

realtime(Q,S,F) returns asynchronous level 1 data for a specified field list using the default socket listener and event handler.

realtime(Q,S,elistener,ecallback) returns asynchronous level 1 data using an explicitly defined socket listener and event handler. For example, you can return this data for security ABC using the function handles iqfeedlistener and iqfeedeventhandler.

realtime(q,'ABC', ...
      {'Symbol','Exchange ID','Last','Change','Incremental Volume'}, ...
      @iqfeedlistener,@iqfeedeventhandler)

Arguments

Q	IQFEED® connection handle created using iqf.
S	S is specified as a character vector or string for a single security or a cell array of character vectors or string array for multiple securities.
F	F is the field list. If no field list is specified or it is input as empty, the default IQFEED level 1 field will be updated with each tick.
elistener	Function handle that specifies the function used to listen for data on the IQFEED Lookup port.
ecallback	Function handle that specifies the function that processes data event.

Examples

Set the data precision. Setting the connection handle property Protocol determines the date format for the return data based on the IQFEED version specified by the protocol.

q.Protocol = 5.1

q = 

  iqf with properties: 

        User: 'username' 
    Password: 'password' 
        Port: {[1x1 System.Net.Sockets.Socket]} 
    PortName: {'Admin'} 
    Protocol: 5.1000

Return level 1 data for security ABC using the default socket listener and event handler. Display the results in the MATLAB^® workspace variable IQFeedLevelOneData.

realtime(q,'ABC')
openvar('IQFeedLevelOneData')

Return level 1 data for security ABC using a field list and the defaults for the socket listener and event handler. Display the results in the MATLAB workspace variable IQFeedLevelOneData.

realtime(q,'ABC', ...
{'Symbol','Exchange ID','Last','Change','Incremental Volume'})
openvar('IQFeedLevelOneData')