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How to use this site
This is now the nth time that you ignore it despite having been informed several time before.
Use Lookup function to get an element at chosen date
dtstr = "2018-10-01"; // your chosen date
lc = Lookup( C, _DT(dtstr), 0 );
Filter = Status( "lastbarinrange" );
AddColumn(C,"Last Bar Close ", 1.3 );
AddColumn(lc,"Close at " + dtstr, 1.3 );
Alternativally you may use ParamDate
dtstr = "2018-10-01" ; // your chosen default date
pdt = DateTimeConvert(2, ParamDate( "Chosen Date", dtstr));
lc = Lookup( C, pdt, 0 );
Filter = Status( "lastbarinrange" );
AddColumn(C,"Last Bar Close ", 1.3 );
AddColumn(lc,"Close at " + dtstr, 1.3 );