RE: [amibroker] Re: Backtesting Market Timing Signals

["Herman van den Bergen" <psytek@xxxxxxxx>]

Hello Bill,

here is some code, it uses strings (advantage you can make them reusable
with StaticVarSetText()) it is not exactly what you want, but you can modify
the functions to convert dates to DateNum().

function getBuySignalString()
	{
	fh = fopen( "BuyDateString.txt", "r");
	if( fh )
		{
		BuyDateString= fgets( fh );
		fclose(fh);
		}
	return BuyDateString;
	}

function getSellSignalString()
	{
	fh = fopen( "SellDateString.txt", "r");
	if( fh )
		{
		SellDateString = fgets( fh );
		fclose(fh);
		}
	return SellDateString;
	}

BuyDateString = getBuySignalString();
SellDateString = getSellSignalString();
DateNumber = DateNum();
FirstBar = LastValue(ValueWhen(Status("firstbarinrange"),BarIndex()));
Buy=Sell=0;

for(b=FirstBar;b<BarCount;b++)
	{
	Buy[b] = StrFind( BuyDateString, NumToStr(DateNumber[b],1.0,False)) > 0;
	Short[b] = StrFind( SellDateString, NumToStr(DateNumber[b],1.0,False)) > 0;
	}

Plot(Buy,"BUY",5,2);
Plot(Short,"short",4,2);

Title = BuyDateString+"\n"+SellDateString;

-----Original Message-----
From: bilbo0211 [mailto:bilbod@xxxxxxxxxx]
Sent: Monday, March 07, 2005 3:12 PM
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] Re: Backtesting Market Timing Signals



>>You should contact the author of the formula. I am not the autor.<<

I am the author of the formula. I am trying to evaluate Amibroker and
I selected what I thought was a simple problem. I put some timing
signals in a file, like this:

S,03/16/2004
B,04/01/2004
S,04/27/2004
B,06/07/2004

I could find no built in capability to deal with this simple situation
so I wrote my own formula.

>> printf output is written to:
- commentary window
- interpretation window. <<

I tried using printf statements for debugging but they generate no
output. I tried using _TRACE with debugview but it generates no output
either.

I am not a computer programmer but I do find it necessary to write
programs occasionally so I am not completely clueless. Unfortunately I
am coming to the conclusion that unless you can create your trading
strategies from built in functions, Amibroker is very difficult to use
primarily due to a lack of debugging capability.

Bill





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