[amibroker] Missing Buy/Sells in Backtesting.

[Keith Osborne <kosborn3@xxxxxxxxxxxxxx>]

Hi, I am backtesting a system and getting a strange mismatch between to 
backtest runs.

Backtest run #1:

Run on current symbol (PBL.AX)
Range: All quotations
Weekly period
Results: 11 transactions all checked on chart and all are correct. Of 
these 11 transactions 3 are during the period 1/1/2000 - 30/6/2005.

Backtest run #2:

Run on current symbol (PBL.AX)
Range: 1/1/2000 - 30/6/2005
Weekly periods
Results: 2 transactions. These are correct and hence there is one 
missing. The one missing is the first one during the shorter period. ( 
Still get the BUY/SELL arrows of the missing transaction)

The entry signal requires a 21 period to set up the BUY trigger. The 
missing BUY transaction is only 15 weeks from the beginning of the 
shorter range.

Do I assume correctly (or not) that the backtester starts evaluation at 
the beginning of the range and would not trigger a BUY until the 21 
weeks are evaluated. Sounds obvious when you write it down!!
If true then how do I make the BUY/SELL arrows disappear?

Regards.............Keith


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