Re: [system-traders] How to create new signals?

[Raphael H. <ra...@ge...>]

Le Sun, May 18, 2003 at 09:16:12PM +0200, Oliver Bossert écrivait:
> Hi, 

Hi,

> > not my favourite area) I've not yet understood how I can develop new
> > signals; for example:
> 
> The best way to develop a new signal is to use an existing one and 
> modify it. Just try it out and ask for help if run into problems. 

BTW, the modules GT/Signals/Prices/*.pm are probably the easiest
to adapt into a signal "Inside day" ...

> > I would like to create a signal which gets triggered when there are
> > two inside days (inside day = lower high and higher low than
> > yesterday) in succession and the ADX indicator is above 30 and +DI is
> > higher than -DI. I then would like to run this signal across my stocks
> > symbols, e.g. with the 'scan.pl' script available in the 'scripts'
> > directory.
> 
> For the inside day I would create a new signal in GT::Signals::Xxx 
> (post is into the devel-group if it works). In the other case you can 
> use the Generic Signals:
> 
> Signals::Generic::And Signals::Generic::Above {I:ADX} 30 
> Signals::Generic::Above {I:ADX/2} {I:ADX/3}

A little error here. You miss some { } ... and the final signal would be:

Signals::Generic::And { S:Generic:Repeated {S:Prices:InsideDay} 2 } { S:Generic:Above {I:ADX} 30 } { S:Generic:Above {I:ADX/2} {I:ADX/3} }

However Signals/Generic/Repeated.pm must still be written... and
Signals/Prices/InsideDay.pm also.

The Repeated signal would return true if the given signal happened on each
of the X last days. Anyone willing to do it quickly ? :-)

Cheers,
-- 
Raphaël Hertzog -+- http://www.ouaza.com
Formation Linux et logiciel libre : http://www.logidee.com
Earn money with free software: http://www.geniustrader.org