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If you set your database for 1 minute then 50K bars won't be enough.
Mine is set to 500K to allow about 8 months of data to be stored. AB
will truncate data beyond the number of bars you specify.
Backfilling 1 minute data, you can back fill up to 30 days of data.
Right click on the green COMM icon at the lower right and set the
back fill limit to 30 days and then back fill. If you have a lot of
symbols expect pacing errors. IB is a pain in the butt when it comes
to back filling data. They will throw up a pacing error if you try to
download too much data in a period of time. AB handles the errors but
it might take a while to finish back filling. Let it finish and then
click on every symbols to ensure it back filled them all.
Once you back fill all the data you can get change the back fill
period to 1 day. I have a formula that will backfill data for all
symbols and graph them. DON'T run this on an active chart. It really
slows your system down. I display that chart once at the beginning of
the day and it will back fill data for all symbols. Then I do it at
the end of the day. I included the formula below. I put all symbols
in watchlist 40. The easiest way to do this is open AmiQuote and
import the symbols from AB. Save that list in a txt or csv file and
import that into a watchlist. If you use something other than
watchlist 40 you will have to change that in the formula.
Barry
_SECTION_BEGIN("1 Minute Grabber ");
SetChartOptions(0,chartShowArrows|chartShowDates);
Filename = StrLeft(_DEFAULT_NAME(),StrLen(_DEFAULT_NAME())-2);
_N(Title = filename + StrFormat(" - {{DATE}} {{VALUES}} "));
// Version 1a - Coded 1/23/08
// Program designed by Barry Scarborough
Watchlist = 40; // change to the watchlist you want to use
Color = 2;
Count = 0;
// retrive comma-separated list of symbols in watch list
list = CategoryGetSymbols( categoryWatchlist, watchlist );
for( i = 0; ( sym = StrExtract( list, i ) ) != ""; i++ )
{
MyC = Foreign( sym, "C");
++Count;
++Color;
if(i == 0 OR count == 7) // puts 7 symbols on a line
{
plot(MyC, "\n" + strleft(sym, 4), color,
styleownscale); // get the close values for the symbol from the
watchlist
Count = 0;
}
else
plot(MyC, strleft(sym, 4), color, styleownscale); //
get the close values for the symbol from the watchlist
}
_SECTION_END();
--- In amibroker@xxxxxxxxxxxxxxx, "howard smith" <hsmith1661@xxx>
wrote:
>
> Hi I am a new user of Amibroker and trying to use the Interactive
> Brokers TWS feed, all of the Intraday Charts look fine but when I
try
> and select a longer term Daily chart only 5 days are returned,is
this
> a limitation of either program, I'm using version 1.71 of the IB
> Plugin and number of bars to load is set to 50k. Thanks.
>
------------------------------------
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