[amibroker] need help with this code

[murthysuresh]

In my 5 minute intraday chart, i am trying to identify when it crossed 
yesterday's daily High.
_SECTION_BEGIN("PlotYesterdayHigh");
dc = TimeFrameCompress( High,inDaily ); 
WriteIf( Cross(Close,Ref(dc,-1)), "The close crossed yesterday high." 
+ "Yesterday high = " + WriteVal(Ref(dc,-1)) + "Close = " + WriteVal
(Close) ,"") ;
_SECTION_END();

It is not working for reasons i dont know.

I would appreciate some assistance.

Seede