[amibroker] Scaling In/Averaging Down

["Charles J. Dudek" <trader@xxxxxxxxxxxxxx>]

I'm confused about how scaling in works.  I've read the section in the
user guide on this, but I haven't been able to apply the examples to
what I want to do.  I would like to test trading as follows:

-- Buy one contract immediately on my first signal
-- Buy another contract if I'm still getting a buy signal, but the
price has fallen to a certain level.
-- Buy another contract if I'm still getting a buy signal, but the
price has fallen to an even lower level.

I know it can be tested, I just can't figure out how to do it based on
the examples in the user guide.  Am I on the right track with
something like this?

Buy=IIf(MA20>MA30,1,IIf(MA20>MA30 AND L<=s1,sigScaleIn,IIf(MA20>MA30
AND L<s2,sigScalein,0))); 

How does setpositionsize impact this?  I mean it sounds like
setpositionsize is used to determine the incremental purchase, but how
do you set the maximum number of contracts to buy?

TIA
Chuck



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