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Hi Dimitris,
Many years ago I subscribed to TeleScan... an online stock screening
service. And I did some trading based upon a custom screen I
developed. Then unexpectedly, my custom screen totally stopped
generating trades. Turned out that TeleScan software developers
changed the calculation on one indicator, and they did this without
documenting it for their customer base.
It should be expected that as AB evolves, TJ will occasionally change,
fix or enhance an indicator in such a way that its behaviour differs
from before.
The way I have always dealt with this possible situation (even with my
own backtesting software) is to document the backtested results from
trading systems I use. Then periodically just re-run the backtest and
verify that the results have not changed.
Phsst
--- In amibroker@xxxxxxxxxxxxxxx, "DIMITRIS TSOKAKIS" <TSOKAKIS@xxxx>
wrote:
> There is another, personal not general, question.
> I made interesting profits using LLV, LLVBARS *as is*.
> What shall I do if tomorrow they will change ?
> I applied strict decisions based on DEMA *as is* with great success.
> Should I sacrifice my studies/applications in the name of functions
> better integrity ?
> Have you ever come in this position ?
> No need for any reply, it is a personal question.
> Dimitris Tsokakis
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