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I asked support the same question. Here is Marcin's reply:
"Natively it's not possible to store bid/ask prices in AmiBroker database,
so the only workaround would be to catch Bid prices in the LAST field when
using DDE plugin. Alternatively - please search for an engine that will
allow you to store the quotes in the SQL database and then - use ODBC
plugin:
http://www.amibroker.com/odbc.html";
On Fri, 22 Dec 2006 12:58:52 -0500, Charles J. Dudek
<trader@xxxxxxxxxxxxxx> wrote:
> I'm trying to create an indicator that will work like the "pressure"
> indicator in QuoteTracker, i.e. display the trend in shares selling
> at the bid or ask. Here is what I tried, with the idea of
> accumulating each trade and then displaying it on a one-minute chart,
> but it doesn't work the way I intended. I have to believe somebody
> else has written the code for this kind of thing, but I didn't find it
> in the library. Any ideas? TIA
>
> p=Param("Smoothing Period",10,2,200,1);
> Cumnv=0;
> bd=GetRTData("bid");
> ak=GetRTData("ask");
> Lp=GetRTData("Last");
> tv=GetRTData("tradevolume");
> Ct=GetRTData("ChangeTime");
> nv=IIf(Lp=ak,tv,IIf(Lp=ak,-tv,0));
> Cumnv=IIf(ct<Now(format = 4)-100,Cumnv+nv,nv);
> pressure=MA(nv,p);
> Hcolor=IIf(cumnv<0,colorRed,IIf(cumnv>0,colorGreen,colorWhite));
> Plot(cumnv,"Trade Vol",Hcolor,styleHistogram|styleOwnScale);
> Plot(pressure,"Pressure",Hcolor);
>
> Chuck
>
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