[amibroker] Capturing IQFeed streaming tick data via plugin

[mikesmith930b]

Hi,

I'm writing a plugin that analyzes the IQFeed streaming tick data, (and
also saves it to a file for later use). My main database is 1-minute,
not tick.

Since GetRTData() is called at the chart refresh rate, I am getting the
the data in real time by monitoring the message loop for
WM_USER_STREAMING_UPDATE, (which I believe is called whenever a new tick
arrives), and then reading RecentInfo directly.

Looking at ADK/QT.cpp as an example of how RecentInfo, (ri in the code
below), is filled I see:

    (*1)                  if( ri->fLast != fOldLast || ri->fAsk !=
fOldAsk || ri->fBid != fOldBid )
                             {
                                 ri->nDateUpdate = ri->nDateChange;
                                 ri->nTimeUpdate = ri->nTimeChange;
                             }

                             ri->nBitmap = RI_LAST | ( ri->fOpen ?
RI_OPEN : 0 ) | ( ri->fHigh ? RI_HIGHLOW : 0 ) | RI_TRADEVOL | RI_52WEEK
|
                                 RI_TOTALVOL | RI_PREVCHANGE | RI_BID |
RI_ASK | RI_DATEUPDATE | RI_DATECHANGE;

    (*2)                  ri->nStatus = RI_STATUS_UPDATE |
RI_STATUS_BIDASK | RI_STATUS_TRADE | RI_STATUS_BARSREADY;

Now with IQFeed I see plenty of ticks where (*1)is false, and they don't
seem to be used by the Time&Sales, so what do they represent?

Also I would expect nStatus to generally not be zero, see (*2), but it
is zero - once the initial feed gets up to date.  Why?

Thanks,
Mike S