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[amibroker] basic question about code in AA window



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Hi,

Back to using AMI after a long delay... very rusty...

Can someone explain this behaviour:

PART OF AFL CODE >>>

Buy=trade_setup; testbuy=Buy;

SellSTOP=ValueWhen(Buy,(Ref(Low,-1)*0.90),N=1); 

RESULTS OF AN EXPLORE >>>

Symbol	Date/Time	Buy  testbuy	Sell	SellSTOP
QQQ	5/24/1999	0	0	0	39.21	
QQQ	5/25/1999	1	1	0	40.95	
QQQ	5/26/1999	0	1	0	39.70	
QQQ	5/27/1999	0	0	0	39.70

What I don't understand is how, given that testbuy=Buy, that they 
can be different on 5/26. What prompted this was that I noticed my 
SellSTOP changing while in a trade, and the only way that could 
happen is if I got another Buy while already in a trade. How do I 
lock in the SellSTOP price for good at the initial Buy, and hold it 
until the sell? This is driving me nuts!!!

Thanks for the help, Jim








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