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[amibroker] Back Testing "Trades Tab" Understanding Concepts



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I have a problem understanding the concepts of Trades Tab as below.

Prices buy/sell/short/cover price fields - allows the user to define 
at which price to buy/sell/short sell/buy to cover during system test

Delays buy/sell/short/cover delay - allows to define custom delay 
between signal and trade 


During a BT of the Current Symbol ER2H7 ,one minute, LONG, over last 
30 days I get the following with $10000.Two delays are set to 1.

winners = 168 (66.67%), # losers = 84 (33.33%)

Looks great however it does NOT change the results when I change the 
Buy Price or Sell Price to "Open,Close,High,Low or Average". 

If I change the delay to 0, it improves the result and still not 
affected by changing to "Open,Close,High,Low or Average". 

winners = 250 (96.15%), # losers = 10 (3.85%)

Can some one explain just how this works. I believe it used to work!
(Version  4.90.3   Build date: Feb  7 2007)

Ray



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