auto analysiser code

["David Holzgrefe" <dtholz@xxxx>]

Tomasz or other afl writers in trying to write and 
auto analysis code to tell me when a stock is trending up or down for that 
matter :
 
I guess the logic should go if todays close is 
higher than period 1 and period 2 is higher than period 3 etc then signal a 
buy/sell ?
 
buy= close() > ref( close(),-1 ) and ref( 
close(),-1 )> ref( close(), -2 );