Hi Howard,
i'm wondering if you know what this means,,
when i run the exploration one day and then
backtest for the following day to see if it selects the same stock
....
i'm finding that the program is just about always
selecting the first stock that has a positionscore value of 1.#J or -1.#J
instead of selecting the stock that has the highest positionscore
value.
I'm assuming it's some computer language but
wondering why it's mixing in with typical counting,,,well not actually wondering
why but wondering how to fix it please ???
regards
Paul
----- Original Message -----
Sent: Saturday, September 27, 2008 10:25
PM
Subject: Re: [amibroker]
backtesting
Hi Howard,
I just returned from the Alpine region of Victoria and downloaded the mass's
of Amibroker emails ,i was lucky enough to spot your reply amongst them,thank
you.
I'll now make a cup of tea and have a play
with the new code,
warm regards
Paul
(ps thanks
for fixing my Christian name up too, from my unfamilar cousin's.)
----- Original Message -----
Sent: Thursday, September 25, 2008 8:22
AM
Subject: Re: [amibroker]
backtesting
Paul -- I meant Paul.
On Wed, Sep 24, 2008 at 3:21 PM, Howard B <howardbandy@gmail.com>
wrote:
Hi Nick -- I've taken the liberty of starting with
your first code segment, adding some comments, and making some
changes. I may not have gotten all of your preferences correct, but
try this and see if it
helps. Thanks, Howard //////////// ////////////////////////////////////////
//
radge1.afl
//Day Trade
InitEquity =
100000; SetOption("InitialEquity",InitEquity);
SetTradeDelays
(1,1,0,0); // Explore today trade tomorrow
// Number of
positions to hold MaxQty =
10; SetOption("maxopenpositions",MaxQty);
//
Uncomment the way you want to set position size
// $5000 for each
trade // PositionSize = 5000;
// positionsize is proportional to
maximum number held PositionSize = -100 / MaxQty;
//
PositionScore is the ratio of 1 day rate of change to 10 day rate of
change // unless the 1 day rate of change is zero, PositionScore will
always be non-zero // that is, PositionScore will always be
True PositionScore = ROC(C,1) / ROC(C,10); //looking for a big move
compared to the last 2 weeks
// Since PositionScore is
always True, // Filter is True when Close >
Open. // Filter = PositionScore AND Close > Open; //looking for the
biggest move on an up day. Filter = Close > Open;
// Set a
buy signal BuySignal = Filter;
// Buy whenever today's close
is greater than // today's open. // But not two
days in a row. Buy = BuySignal AND
NOT(Ref(BuySignal,-1));
// BuyPrice is tomorrow's
Open BuyPrice = Open;
// As it stands, the original
statement says Sell whenever Close is not Zero. // You want to sell on
the same day you bought. Sell = Buy;
// You might mean
SellPrice = Close? SellPrice =
Close; AddColumn(PositionScore,"score"); //lets me
see the score values in an exploration
// if anyone could
advise on the above idea i would appreciate the
help,,,
//////////////////////////////////////////////////////
On Mon, Sep 22, 2008 at 4:04 AM, Paul Radge <paulradge@xxxxxxxxxcom.au> wrote:
Hi all,
i recently read
a few posts here in the forum and learnt about the function
"positionscore".As a non programer i find the forum very
usefull.
From those posts i've tried to follow
a similar line and test a day trading system,,,like many of my ideas and
notions though it may bare no cash flow.
What i tried to do was look for a break out
and then buy the open next day and sell the close as a true day
trade no money down.Here's what i attempted
//Day Trade
positionscore = ROC(c,1) / ROC(C,10);
//looking for a big move compared to the last 2 weeks
Filter = Positionscore and Close > Open;
//looking for the biggest move on an up day.
Buy = Filter;
Buyprice = Open;
Sell = close;
settradedelays = (1,0,0,0); // Explore
today trade tomorrow (?)
positionsize = 5000;
addcolumn(positionscore,"score");
//lets me see the score values in an exploration
//I've got maxtrades set to 1 within
settings
When i explore from 18/9/08 to 18/9/08 i
get stock abc.asx for example but when i backtest from 19/9/08 to
19/9/08 i'm not getting the same ticker that i expected to see traded
with the Buy delay set to 1.
If anyone could advise on the above
idea i would appreciate the help,,,
i also tried this with no
luck,,,,,,,,,,,
positionscore = ROC(C,1) /
ROC(C,10);
cond1 = c > o;
longsetup = postionscore and
cond1;
filter =
ref(longsetup,-1);
buy = filter ;
buyprice = open;
sell = close;
settradedelays = (0,0,0,0);
positionsize = 5000;
addcolumn(positionscore,"score");
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