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B
Thanks for posting this, it is really
useful and will circulate to our local group.
If you're running these screens on a
daily basis, is there a way "programatically" to
erase the subject watchlist, that is 'make
empty' so that you have a fresh set of tickers that meet
your criteria each time you run this
code.
Best regards
JOE
----- Original Message -----
Sent: Thursday, June 23, 2005 3:24
PM
Subject: RE: [amibroker] AmiBroker
Performance Continued -- What Settings are Fastest?
Tomasz and others:
This is a very interesting and
helpful discussion. I am
sure I speak for many others.
Since my
current system is limited to 1.5 GB of RAM, I have
also used special
watchlists to reduce the number of stocks
that AB needs so everything fits
into RAM.
Here is a snip of AFL to give the idea how these
watchlists
can be created. The key is to use "CUM" to find any
stock
that needs to be in the watchlist.
Watch for line wrap
problems when copying the
code.
b
//----------------------------------------------
//For
increased testing speed,
//it is helpful to group stocks into
//watchlists with minimum volume,
//and also by price ranges. Note, if
a stock meets
//the criteria of a watchlist for even
//a single day, it
is included in the watchlist.
// although I trade with 100k mininum
vol, this uses
// 50k since 100k gives too few stocks prior to
1998
av50 = MA(V,5) > 50000;// use 100k for stocks over
$10
p1_10 = av50 AND OI >= 100 AND OI < 1000;
p10_up =
av50 AND OI >= 1000;
Cum_p1_10 = LastValue(Cum(p1_10)
,True);
Cum_p10_up = LastValue(Cum(p10_up) ,True);
if(Cum_p1_10)
CategoryAddSymbol( "", CategoryWatchlist, 56
) ;//US
1-10
if(Cum_p10_up)CategoryAddSymbol( "", categoryWatchlist, 58
) ;//US
10+
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